# Slot 4 Menu 9 Single Line Descriptions − Resources

Mode: RFC‑S

Parameter | Range | Default | Type
--- | --- | --- | ---
4.09.001 | Cyclic Tx Links Free | 0 to 255 |  | RO | Num | ND | NC | PT |
4.09.002 | Cyclic Rx Links Free | 0 to 255 |  | RO | Num | ND | NC | PT |
4.09.003 | Fieldbus Links Free | 0 to 255 |  | RO | Num | ND | NC | PT |
4.09.004 | Cyclic Mappings Free | 0 to 255 |  | RO | Num | ND | NC | PT |
4.09.008 | Background cycles per second | 0 to 65535 |  | RO | Num | ND | NC | PT |
4.09.010 | Synchronous Task % Free | 0 to 255 % |  | RO | Num | ND | NC | PT |
4.09.020 | Synchronous Task Worst % Free | 0 to 255 % |  | RO | Num | ND | NC | PT |
4.09.030 | PCB Temperature | -128 to 127 °C |  | RO | Num | ND | NC | PT |

RW | Read / Write | RO | Read-only | Bit | Bit parameter | Txt | Text string | Date | Date parameter | Time | Time parameter
Chr | Character parameter | Bin | Binary parameter | IP | IP address | Mac | MAC address | Ver | Version number | SMP | Slot, menu, parameter
Num | Number parameter | DE | Destination | ND | No default value | RA | Rating dependent | NC | Non-copyable | PT | Protected
FI | Filtered | US | User save | PS | Power-down save |  |  |  |  |  |