210 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Appendix F MicroLogix 1400 Distributed Network Protocol
FC_DIRECT_OPERATE (FC Byte = 0x05)
05 – Direct Operate
This direct operate function is similar to the FC_OPERATE function code
except that no preceding select command is required.
FC_DIRECT_OPERATE_NR (FC Byte = 0x06)
06 – Direct Operate No Resp
See FC_DIRECT_OPERATE (FC Byte = 0x05). No response message is returned
when this request is issued from a DNP3 master.
FC_IMMED_FREEZE (FC Byte = 0x07)
07 – Immediate Freeze
Upon receiving a request with this function, the controller copies the current
value of a counter point to a separate memory location associated with the
same point. The copied value remains constant until the next freeze operation
to the same point.
FC_IMMED_FREEZE_NR (FC Byte = 0x08)
08 – Immediate Freeze No Resp
See FC_IMMED_FREEZE (FC Byte = 0x07)
. No response message is returned
when this request is issued from a DNP3 master.
FC_FREEZE_CLEAR (FC Byte = 0x09)
09 – Freeze and Clear
Upon receiving a request with this function, the controller copies the current
value to the frozen value, then clears the current value to 0 immediately.
FC_FREEZE_CLEAR_NR (FC Byte = 0x0A)
10 – Freeze and Clear No Resp
See FC_FREEZE_CLEAR (FC Byte = 0x09). No response message is returned
when this request is issued from a DNP3 master.
FC_COLD_RESTART (FC Byte = 0x0D)
13 – Cold Restart
This function code forces the controller to perform a complete restart upon
powering up.
FC_WARM_RESTART (FC Byte = 0x0E)
14 – Warm Restart
This function code forces the controller to perform a partial reset.
This applies only to the MicroLogix 1400 Series B and Series C controller.
FC_INITIALIZE_APPL (FC Byte = 0x10)
16 – Initialize Application
This function code is used to initialize the user program which was
downloaded by RSLogix 500/RSLogix Micro software.
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