CHAPTER 7: MODBUS COMMUNICATIONS
MODBUS FUNCTIONS
PQM POWER QUALITY METER – INSTRUCTION MANUAL
7–9
7.2.5
Function Code
06 – Store
Single Setpoint
Modbus Implementation
: Preset Single Register
PQM Implementation
: Store Single Setpoint
This command allows the master to store a single setpoint into the memory of a PQM. The
slave response to this function code is to echo the entire master transmission.
MESSAGE FORMAT AND EXAMPLE:
Request slave 17 to store the value 01E4 in setpoint address 1020. After the transmission in
this example is complete, setpoint address 1020 will contain the value 01E4.
Table 7–4: Master/Slave Packet Format for Function Code 06h
MASTER
TRANSMISSION
BYTES
EXAMPLE
DESCRIPTION
SLAVE ADDRESS
1
11
message for slave 17
FUNCTION CODE
1
06
store single setpoint
DATA STARTING
ADDRESS
2
10 20
setpoint address 1020
DATA
2
01 E4
data for setpoint address
1020
CRC
2
8E 47
CRC error code
SLAVE RESPONSE
BYTES
EXAMPLE
DESCRIPTION
SLAVE ADDRESS
1
11
message from slave 17
FUNCTION CODE
1
06
store single setpoint
DATA STARTING
ADDRESS
2
10 20
setpoint address 1020
DATA
2
01 E4
data stored in setpoint
address 1020
CRC
2
8E 47
CRC error code
Содержание Multilin PQM
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