252 Rockwell Automation Publication 1766-UM001I-EN-P - June 2015
Appendix F MicroLogix 1400 Distributed Network Protocol (DNP3)
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 the comment for FC_DIRECT_OPERATE. 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 MicroLogix 1400 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 the comment for FC_IMMED_FREEZE. 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 MicroLogix 1400 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 the comment for FC_FREEZE_CLEAR. 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 MicroLogix 1400 to perform a complete restart
upon powering up.
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