Mode: RFC‑A
Message Load
The Ethernet interface can accommodate multiple protocols running concurrently, each protocol demanding system resources. To ensure that the interface is not overloaded the following limitations should be followed.
When checking that the message loading on a device is going to be acceptable, consider all protocols, e.g.:
|
Protocol |
Number of Parameters |
Rate |
Parameters Accesses / Second |
Message Rate / Second |
|
Modbus TCP/IP |
10 read |
100 ms |
100 |
10 |
|
EtherNet/IP |
5 read |
10 ms |
500 |
100 |
|
5 write |
10 ms |
500 |
100 | |
|
RTMoE |
2 write |
500 µs |
4000 |
2000 |
|
Total |
5100 |
2210 | ||
|
Max. supported by Onboard Ethernet interface |
6000 |
8000 | ||
|
Within Capability? |
Yes |
Yes | ||
Cyclic data, with the exception of synchronous cyclic data, is exchanged with the drive and other options in the interface's background task. Background cycles per second (4.09.008) can be used to view the cycle rate of the background task. If the value drops to zero then a BG Overrun drive trip will occur.
RTMoE
RTMoE is an industrial Ethernet protocol for both cyclic and acyclic communication. The Ethernet interface RTMoE capabilities can be found in the table below.
|
Capability |
Support Level |
|
Non-cyclic communication |
Supported |
|
Total transmit cyclic links |
5 |
|
Total receive cyclic links |
5 |
|
Max number of transmit synchronous cyclic links |
1 (Onboard interface only) |
|
Max number of receive synchronous cyclic links |
1 (Onboard interface only) |
|
Max length of non-synchronous cyclic link |
10 x 32 bit |
|
Max length of synchronous cyclic link |
2 x 32 bit |
|
Min transmission period |
500 µs |
|
Synchronized with AMC |
Yes (when cycle time >= 500us) |
|
Synchronized with onboard program |
Yes (when cycle time = 4ms) |
| Parameter | 4.09.001 Cyclic Tx links free | ||
|---|---|---|---|
| Short description | Cyclic Tx links free | ||
| Minimum | 0 | Maximum | 255 |
| Default | Units | ||
| Type | 8 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT, BU | ||
The number of available transmit cyclic links.
| Parameter | 4.09.002 Cyclic Rx links free | ||
|---|---|---|---|
| Short description | Cyclic Rx links free | ||
| Minimum | 0 | Maximum | 255 |
| Default | Units | ||
| Type | 8 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT, BU | ||
The number of available receive cyclic links.
| Parameter | 4.09.003 Fieldbus Links Free | ||
|---|---|---|---|
| Short description | Available Tx/Rx process images | ||
| Minimum | 0 | Maximum | 255 |
| Default | Units | ||
| Type | 8 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT, BU | ||
The number of available transmit / receive process images for fieldbus protocols such as Ethernet/IP.
| Parameter | 4.09.004 Cyclic Mappings Free | ||
|---|---|---|---|
| Short description | Number of cyclic mapping free | ||
| Minimum | 0 | Maximum | 255 |
| Default | Units | ||
| Type | 16 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT, BU | ||
The number of available mappings in the system for use in cyclic links.
| Parameter | 4.09.008 Background cycles per second | ||
|---|---|---|---|
| Short description | Background task runs per seconds | ||
| Minimum | 0 | Maximum | 65535 |
| Default | Units | ||
| Type | 16 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT, BU | ||
The background task cycles per second represents the number of times per second the background task is currently executing. The background task is responsible for cyclic data exchange with the drive. With more cyclic data mapped the cycle rate of the task will decrease.
| Parameter | 4.09.010 Synchronous Task % Free | ||
|---|---|---|---|
| Short description | Synchronous Task % Free | ||
| Minimum | 0 | Maximum | 255 |
| Default | Units | % | |
| Type | 8 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT, BU | ||
Note: Synchronous Cyclic Links are supported by the Onboard Ethernet interface, but not on the option module interface.
| Parameter | 4.09.011 Nonsync link update period | ||
|---|---|---|---|
| Short description | Nonsync link update period | ||
| Minimum | 0.00 | Maximum | 655.35 |
| Default | Units | ||
| Type | 16 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 2 |
| Coding | RO, ND, NC, PT, BU | ||
The number of detected overruns per seconds for non-synchronous cyclic links.
| Parameter | 4.09.020 Synchronous Task Worst % Free | ||
|---|---|---|---|
| Short description | Sync Task Worst % Free | ||
| Minimum | 0 | Maximum | 255 |
| Default | Units | % | |
| Type | 8 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT, BU | ||
Worst case free resource of the synchronous task.
Note: Synchronous Cyclic Links are supported by the Onboard Ethernet interface, but not on the option module interface.
| Parameter | 4.09.021 Max nonsync link update period | ||
|---|---|---|---|
| Short description | Max nonsync link update period | ||
| Minimum | 0.00 | Maximum | 655.35 |
| Default | Units | ||
| Type | 16 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 2 |
| Coding | RO, ND, NC, PT, BU | ||
The maximum detected overruns per seconds for non-synchronous cyclic links.
| Parameter | 4.09.030 PCB Temperature | ||
|---|---|---|---|
| Short description | PCB Temperature | ||
| Minimum | -128 | Maximum | 127 |
| Default | Units | °C | |
| Type | 8 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, ND, NC, PT | ||
Gives the current PCB temperature