# Menu 7 − Analog I/O

Mode: Regeneration

Analog Outputs
The update rate for analog outputs is 250μs; although the output will only change at the update rate defined by the source parameter for the input. The following exceptions apply:

1. Speed Feedback (03.002) has an update rate of 4ms and includes a 16ms window filter. If this parameter is selected as a source for output 2 the update rate of the source changes to 250us and the only filter applied is the window filter associated with the position feedback interface (i.e. P1 Feedback Filter (03.042) for the P1 interface). It should be noted that this feature is only provided when the position feedback is from a drive interface and not from an option module.
2. If either analogue output is set up for current mode then the update rate for both analogue outputs is 4ms.

Analog Inputs
The normal sample rate for the analog inputs is 4ms, however this is increased to 250us for analogue inputs 1 and 2 under the following conditions:

1. The maximum and the minimum for the input are at their default values of 100.00% and -100.00% respectively.
2. The input is set to voltage mode.
3. One of the destinations given in the table below must be selected.
4. If the destination is Analog Reference 1 (01.036) or Analog Reference 2 (01.037) the reference system must not be in uinpolar mode, i.e. Bipolar Reference Enable (01.010) must be one.

Note that Analogue Input 1 Fast Update Active (07.026) and Analogue Input 2 Fast Update Active (07.027) indicate if fast updating is active for each input.

Parameter | Drive modes | Comment
Analog Reference 1 (01.036) | RFC-A, RFC-S | The data from Analog Reference 1 (01.036) is processed in the 250us task so that the reference to the speed controller is updated every 250us.
Analog Reference 2 (01.037) | RFC-A, RFC-S | The data from Analog Reference 2 (01.037) is processed in the 250us task so that the reference to the speed controller is updated every 250us.
Hard Speed Reference (03.022) | RFC-A, RFC-S |
Torque Reference (04.008) | RFC-A, RFC-S |
Power Input 1 (03.010) Power Input 2 (03.013) Power Input 3 (03.014) | Regen |

The diagram below shows the parameter structure for each I/O. See Internal I/O Identifier (11.068) for details of which I/O is present for different I/O options.

Parameter | 07.003 Analog Input 3
--- | ---
Short description | Displays the value of analog input 3
Mode | Regeneration
Minimum | -100.00 | Maximum | 100.00
Default |  | Units | %
Type | 16 Bit Volatile | Update Rate | 4ms write
Display Format | Standard | Decimal Places | 2
Coding | RO, FI, ND, NC, PT

See Analog Input 1 (07.001).

Parameter | 07.004 Monitored Temperature 1
--- | ---
Short description | Displays the temperature set up by Temperature Monitor Select 1
Mode | Regeneration
Minimum | -250 | Maximum | 250
Default |  | Units | °C
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Thermal monitoring is provided within the drive to protect the power stage and the control system from over temperature.

Monitored Temperature 1 (07.004), Monitored Temperature 2 (07.005) and Monitored Temperature 3 (07.006) give an indication of the temperature of three selected monitoring points within the drive power system or control system. The required monitoring points can be selected using Temperature Monitor Select 1 (07.038), Temperature Monitor Select 2 (07.039) and Temperature Monitor Select 3 (07.052) respectively. The default values give two monitoring points in the power system in Monitored Temperature 1 (07.004) and Monitored Temperature 2 (07.005), and control board temperature 1 in Monitored Temperature 3 (07.006).

Parameter | 07.005 Monitored Temperature 2
--- | ---
Short description | Displays the temperature set up by Temperature Monitor Select 2
Mode | Regeneration
Minimum | -250 | Maximum | 250
Default |  | Units | °C
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

See Monitored Temperature 1 (07.004) for details.

Parameter | 07.006 Monitored Temperature 3
--- | ---
Short description | Displays the temperature set up by Temperature Monitor Select 3
Mode | Regeneration
Minimum | -250 | Maximum | 250
Default |  | Units | °C
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

See Monitored Temperature 1 (07.004) for details.

Parameter | 07.015 Analog Input 3 Mode
--- | ---
Short description | Defines the mode of analog input 3
Mode | Regeneration
Minimum | 7 | Maximum | 10
Default | 10 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text | Description
6 | Volt | Voltage
7 | Therm Short Cct | Temperature measurement input with short circuit detection
8 | Thermistor | Temperature measurement without short circuit detection
9 | Therm No Trip | Temperature measurement input with no trips
10 | Disabled | Input always zero

The table below gives all the possible input modes for analog input 3.

Mode | Function
Voltage | Voltage
Therm Short Cct | Temperature measurement input with short circuit detection
Thermistor | Temperature measurement without short circuit detection
Therm No Trip | Temperature measurement input with no trips
Disabled | Input always zero (1)

(1) When the Digital I/O only is present this mode is used disable the current source as the input is on a shared connection with Digital Input 5.

Parameter | 07.033 Power Output
--- | ---
Short description | Instant output power
Mode | Regeneration
Minimum | -100.0 | Maximum | 100.0
Default |  | Units | %
Type | 16 Bit Volatile | Update Rate | 250µs write
Display Format | Standard | Decimal Places | 1
Coding | RO, ND, NC, PT

This is an instantaneous power output with fast update rate that is primarily intended to be used as a power feed-forward for applications with a Regen system front end. The full scale (100.0%) value is equal to a power of 3 x (VM_DC_VOLTAGE[MAX] / 2√2) x Full Scale Current Kc (11.061). This is compatible with the power output provided in Unidrive SP and is directly comptible with Power Input 1 (03.010) (and the other power feed-forward parameters) in Regen mode. The scaling is intended to cover the maximum range of likely power in the drive. For example with a 400V 7.5kW drive the full scale d.c. link voltage is 831V and Kc=38.222A, and so the full scale value of this parameter is 3 x (831 / 2√2) x 38.222 = 33.689kW. For Open-loop, RFC-A and RFC-S modes a positive value of power indicates power flowing from the drive to motor. For Regen mode a positive value of power indicates power flowing from the supply to the regen drive.

Parameter | 07.034 Inverter Temperature
--- | ---
Short description | Displays the estimated junction temperature of the hottest power device within the drive inverter
Mode | Regeneration
Minimum | -250 | Maximum | 250
Default |  | Units | °C
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Inverter Temperature (07.034) shows the estimated junction temperature of the hottest power device within the drive inverter. If this temperature exceeds the switch down threshold defined for the power stage the switching frequency is reduced provided this feature has not been disabled (see Auto-switching Frequency Change (05.035)).

Parameter | 07.035 Percentage Of d.c. Link Thermal Trip Level
--- | ---
Short description | Displays the percentage of the maximum allowed temperature as estimated by the thermal model of the d.c. link components
Mode | Regeneration
Minimum | 0 | Maximum | 100
Default |  | Units | %
Type | 8 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Percentage Of d.c. Link Thermal Trip Level (07.035) gives the percentage of the maximum allowed temperature as estimated by the thermal model of the d.c. link components.

Parameter | 07.036 Percentage Of Drive Thermal Trip Level
--- | ---
Short description | Displays the percentage of the thermal trip level of the temperature monitoring point or thermal model in the drive that is highest
Mode | Regeneration
Minimum | 0 | Maximum | 100
Default |  | Units | %
Type | 8 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Percentage Of Drive Thermal Trip Level (07.036) gives the percentage of the thermal trip level of the temperature monitoring point or thermal model in the drive that is highest. This includes all thermal monitoring points (not just those selected by Monitored Temperature 1 (07.004), Monitored Temperature 2 (07.005) and Monitored Temperature 3 (07.006)), Inverter Temperature (07.034) and Percentage Of d.c. Link Thermal Trip Level (07.035).

Percentage Of d.c. Link Thermal Trip Level (07.035) is used directly to give Percentage Of Drive Thermal Trip Level (07.036), but for all other monitored values which are temperatures this is given by Percentage of thermal trip level = (Temperature - 40oC) / (Trip temperature - 40oC) x 100%

The location of the measurement or the thermal model that is related to this temperature is given in Temperature Nearest To Trip Level (07.037). If Percentage Of Drive Thermal Trip Level (07.036) exceeds 90% Drive Over-temperature Alarm (10.018) is set to one. If Percentage Of Drive Thermal Trip Level (07.036) reaches 100% one of the trips given in the table below is initiated. The trip can be reset when the percentage of thermal trip level fall below 95%.

Temperature | Trip
Inverter Temperature (07.034) | OHt Inverter
Power system temperature | OHt Power
Percentage Of d.c. Link Thermal Trip Level (07.035) | OHt dc Link
Control system temperature | OHt Control

Parameter | 07.037 Temperature Nearest To Trip Level
--- | ---
Short description | Displays the thermistor location or the model that corresponds to the value shown in Percentage Of Drive Thermal Trip Level
Mode | Regeneration
Minimum | 0 | Maximum | 20999
Default |  | Units |
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Temperature Nearest To Trip Level (07.037) shows the thermistor location or the model that corresponds to the value shown in Percentage Of Drive Thermal Trip Level (07.036) in the form xxyzz as shown in the table below.

Source | xx | y | zz
Control system | 00 | 0 | 01: Control board thermistor 1
Control system | 00 | 0 | 02: Control board thermistor 2
Control system | 00 | 0 | 03: I/O board thermistor (or internal braking resistor in servo Drive)
Control system | 00 | 1 | 00: Inverter thermal model
Control system | 00 | 2 | 00: D.c. link thermal model
Control system | 00 | 3 | 00: Braking IGBT thermal model
Power system | 01 | 0 | zz: Thermistor location defined by zz in the power system
Power system | 01 | Rectifier number | zz: Thermistor location defined by zz in the rectifier

Parameter | 07.038 Temperature Monitor Select 1
--- | ---
Short description | Defines the temperature to be monitored in Monitored Temperature 1
Mode | Regeneration
Minimum | 0 | Maximum | 1999
Default | 1001 | Units |
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

Temperature Monitor Select 1 (07.038) selects the temperature to be monitored in Monitored Temperature 1 (07.004) using the format given for Temperature Nearest To Trip Level (07.037). If the monitoring point selected does not exist then the monitored temperature is always zero. The table below shows the monitoring points that can be selected.

Source | xx | y | zz
Control system | 00 | 0 | 01: Control board thermistor 1
Control system | 00 | 0 | 02: Control board thermistor 2
Control system | 00 | 0 | 03: I/O board thermistor (or internal braking resistor in Servo Drive)
Control system | 00 | 1 | 00: Inverter thermal model
Control system | 00 | 3 | 00: Braking IGBT thermal model
Control system | 00 | 4 | 00: Rectifier thermal model
Power system | 01 | 0 | zz: Thermistor location defined by zz in the power system
Power system | 01 | Rectifier number | zz: Thermistor location defined by zz in the rectifier

For a multi-module power system the power system measurement that can be selected is shown in the table below. It should be noted that the specific power module cannot be selected and that the highest temperature from each of the power modules is given.

Source | xx | y | zz
Power system | 01 | 0 | 01: U phase power device thermistor
Power system | 01 | 0 | 02: V phase power device thermistor
Power system | 01 | 0 | 03: W phase power device thermistor
Power system | 01 | 0 | 04: General rectifier thermistors
Power system | 01 | 0 | 05: General power system thermistor

Parameter | 07.039 Temperature Monitor Select 2
--- | ---
Short description | Defines the temperature to be monitored in Monitored Temperature 2
Mode | Regeneration
Minimum | 0 | Maximum | 1999
Default | 1002 | Units |
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

See Temperature Monitor Select 1 (07.038).

Parameter | 07.046 Analog Input 3 Thermistor Type
--- | ---
Short description | Defines the thermistor type for analog input 3
Mode | Regeneration
Minimum | 0 | Maximum | 1
Default | 0 | Units |
Type | 8 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW, TE

Value | Text
0 | DIN44082
1 | KTY84
2 | PT100 (4W)
3 | PT1000 (4W)
4 | PT2000 (4W)
5 | 2.0mA (4W)
6 | PT100 (2W)
7 | PT1000 (2W)
8 | PT2000 (2W)
9 | 2.0mA (2W)

Analog Input 3 Thermistor Type (07.046) defines the operation of the temperature feedback interface for analog input 3 when Analog Input 3 Mode (07.015) is set up for a temperature feedback mode. When a temperature feedback mode is selected a 2mA current source is connected to analog input 3 to supply the temperature feedback device that is connected to the input.

Analog Input 3 Thermistor Type (07.046) | Compatible devices
0: DIN44082 | Three thermistors in series as specified in DIN44082 standard
1: KTY84 | KTY84 PTC thermistor
2: PT100 (4W) | PT100 PTC thermistor with 4 wire connection
3: PT1000 (4W) | PT1000 PTC thermistor with 4 wire connection
4:PT2000 (4W) | PT2000 PTC thermistor with 4 wire connection
5: 2.0mA (4W) | Any device. Full scale equivalent to a resistance of 5k Ohms with 4 wire connection
6: PT100 (2W) | PT100 PTC thermistor with 2 wire connection
7: PT1000 (2W) | PT1000 PTC thermistor with 2 wire connection
8: PT2000 (2W) | PT2000 PTC thermistor with 2 wire connection
9: 2.0mA (2W) | Any device. Full scale equivalent to a resistance of 5k Ohms with 2 wire connection

DIN44082 and KTY84 devices should always be connected directly to analog input 3. The other devices can be connected directly to analog input 3 if the 2 wire connection option is selected. Alternatively these devices can be used with a 4 wire connection to remove the effect of voltage drops due to the 2mA supply current via the path shown below. If a 4 wire connection is selected analog input 1 is disabled and Analog Input 1 (07.001) always reads as 0.0%. It should be noted that the input system takes account of the input impedance of analogue input 3 when 2 wire mode is used, and of both analogue input 1 and analogue input 3 when 4 wire mode is used. For this reason it is important that 2 wire mode is selected when the connection between Analogue Input 1+ and Analogue input 3 is not present, and that 4 wire mode is selected if the connection is present.

Parameter | 07.047 Analog Input 3 Thermistor Feedback
--- | ---
Short description | Displays the measured resistance of analog input 3
Mode | Regeneration
Minimum | 0 | Maximum | 5000
Default |  | Units | Ω
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

Analog Input 3 Thermistor Feedback (07.047) shows the measured resistance.

Parameter | 07.048 Analog Input 3 Thermistor Trip Threshold
--- | ---
Short description | Defines the thermistor trip threshold for analog input 3
Mode | Regeneration
Minimum | 0 | Maximum | 5000
Default | 3300 | Units | Ω
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

Over-temperature detection becomes active for input 3 if Analog Input 3 Thermistor Feedback (07.047) > Analog Input 3 Thermistor Trip Threshold (07.048). Over-temperature becomes inactive for input 3 if Analog Input 3 Thermistor Feedback (07.047) < Analog Input 3 Thermistor Reset Threshold (07.049). If Analog Input 3 Mode (07.015) is 7 or 8 (i.e. tripping is enabled) an Thermistor.003 trip is initiated. The default values for Analog Input 3 Thermistor Trip Threshold (07.048) and Analog Input 3 Thermistor Reset Threshold (07.049) are the levels specified in the DIN 44082 standard.

Parameter | 07.049 Analog Input 3 Thermistor Reset Threshold
--- | ---
Short description | Defines the thermistor reset threshold for analog input 3
Mode | Regeneration
Minimum | 0 | Maximum | 5000
Default | 1800 | Units | Ω
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

See Analog Input 3 Thermistor Trip Threshold (07.048).

Parameter | 07.050 Analog Input 3 Thermistor Temperature
--- | ---
Short description | Displays the temperature of the device based on the resistance to temperature characteristic for the specified device
Mode | Regeneration
Minimum | -50 | Maximum | 300
Default |  | Units | °C
Type | 16 Bit Volatile | Update Rate | Background write
Display Format | Standard | Decimal Places | 0
Coding | RO, ND, NC, PT

If a KTY84, PT100, PT1000 or PT2000 type device is selected for temperature feedback then Analog Input 3 Thermistor Temperature (07.050) shows the temperature of the device based on the resistance to temperature characteristic specified for this device. Otherwise Analog Input 3 Thermistor Temperature (07.050) = 0.0.

Parameter | 07.052 Temperature Monitor Select 3
--- | ---
Short description | Defines the temperature to be monitored in Monitored Temperature 3
Mode | Regeneration
Minimum | 0 | Maximum | 1999
Default | 1 | Units |
Type | 16 Bit User Save | Update Rate | Background read
Display Format | Standard | Decimal Places | 0
Coding | RW

See Temperature Monitor Select 1 (07.038).