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SUPPORTED MODBUS FUNCTIONS
6. COMMUNICATIONS
6-10
6.3.6
FUNCTION CODE 07 - READ DEVICE STATUS
Modbus Implementation:
Read Exception Status
SR469 Implementation:
Read Device Status
This is a function used to quickly read the status of a selected device. A short message length allows for rapid reading of status. The
status byte returned will have individual bits set to 1 or 0 depending on the status of the slave device.
SR469 General Status Byte:
LSBit
B0: R1 Trip relay operated = 1
B1: R2 Auxiliary relay operated = 1
B2: R3 Auxiliary relay operated = 1
B3: R4 Alarm relay operated = 1
B4: R5 Block Start relay operated = 1
B5: R6 Service relay operated = 1
B6: Stopped = 1
MSBit
B7: Running =1
Note: if status is neither stopped or running, motor is starting.
Message Format and Example:
Request status from slave 11.
Master Transmission
Bytes
Example (hex)
SLAVE ADDRESS
1
0B
message for slave 11
FUNCTION CODE
1
07
read device status
CRC
2
47
CRC calculated by the master
42
Slave Response
SLAVE ADDRESS
1
0B
message for slave 11
FUNCTION CODE
1
07
read device status
DEVICE STATUS
1
59
status = 01011001 in binary
CRC
2
C2
CRC calculated by the slave
08
Содержание SR469
Страница 7: ......
Страница 19: ...2 INSTALLATION MECHANICAL 2 5 2 1 5 TERMINAL LOCATIONS Figure 2 11 TERMINAL LAYOUT...
Страница 21: ...2 INSTALLATION ELECTRICAL 2 7 Figure 2 12 TYPICAL WIRING DIAGRAM...
Страница 32: ...ELECTRICAL 2 INSTALLATION 2 18 2 2 14 TYPICAL 2 SPEED MOTOR WIRING...
Страница 39: ...OVERVIEW 3 SR469 OPERATION 3 6 yy SETPOINTS yy S1 SR469 SETUP...
Страница 104: ...4 SETPOINT PROGRAMMING S11 MONITORING 4 65 Figure 4 24 TRIP COIL SUPERVISION...
Страница 113: ...S12 ANALOG I O 4 SETPOINT PROGRAMMING 4 74...
Страница 244: ...8 469PC PROGRAM WAVEFORM CAPTURE 8 13 Figure 8 11 WAVEFORM CAPTURE...