Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 93
Chapter 6 Micro870 Controller Distributed Network Protocol
OPERATE (FC Byte = 0x04)
04 – Operate
See SELECT (FC Byte = 0x03)
on page 92.
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.
DIRECT_OPERATE_NR (FC Byte = 0x06)
06 – Direct Operate No Resp
See DIRECT_OPERATE (FC Byte = 0x05)
. No response message is returned when this request is
issued from a DNP3 master.
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.
IMMED_FREEZE_NR (FC Byte = 0x08)
08 – Immediate Freeze No Resp
See IMMED_FREEZE (FC Byte = 0x07). No response message is returned when this request is
issued from a DNP3 master.
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.
FREEZE_CLEAR_NR (FC Byte = 0x0A)
10 – Freeze and Clear No Resp
See FREEZE_CLEAR (FC Byte = 0x09)
. No response message is returned when this request is
issued from a DNP3 master.
COLD_RESTART (FC Byte = 0x0D)
13 – Cold Restart
This function code forces the controller to perform a complete restart upon powering up.
WARM_RESTART (FC Byte = 0x0E)
14 – Warm Restart
This function code forces the controller to perform a partial reset.
INITIALIZE_APPL (FC Byte = 0x10)
16 – Initialize Application
This function code is used to initialize the user program which was downloaded by Connected
Components Workbench software.
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