6. COMMUNICATIONS
SUPPORTED MODBUS FUNCTIONS
6-11
6.3.7
FUNCTION CODE 08 - LOOPBACK TEST
Modbus Implementation:
Loopback Test
SR469 Implementation:
Loopback Test
This function is used to test the integrity of the communication link. The SR469 will echo the request.
Message Format and Example:
Loopback test from slave 11.
Master Transmission
Bytes
Example (hex)
SLAVE ADDRESS
1
0B
message for slave 11
FUNCTION CODE
1
08
loopback test
DIAG CODE
2
00
must be 00 00
00
DATA
2
00
must be 00 00
00
CRC
2
E0
CRC calculated by the master
A1
Slave Response
SLAVE ADDRESS
1
0B
message from slave 11
FUNCTION CODE
1
08
loopback test
DIAG CODE
2
00
must be 00 00
00
DATA
2
00
must be 00 00
00
CRC
2
E0
CRC calculated by the slave
A1
Summary of Contents for SR469
Page 7: ......
Page 19: ...2 INSTALLATION MECHANICAL 2 5 2 1 5 TERMINAL LOCATIONS Figure 2 11 TERMINAL LAYOUT...
Page 21: ...2 INSTALLATION ELECTRICAL 2 7 Figure 2 12 TYPICAL WIRING DIAGRAM...
Page 32: ...ELECTRICAL 2 INSTALLATION 2 18 2 2 14 TYPICAL 2 SPEED MOTOR WIRING...
Page 39: ...OVERVIEW 3 SR469 OPERATION 3 6 yy SETPOINTS yy S1 SR469 SETUP...
Page 104: ...4 SETPOINT PROGRAMMING S11 MONITORING 4 65 Figure 4 24 TRIP COIL SUPERVISION...
Page 113: ...S12 ANALOG I O 4 SETPOINT PROGRAMMING 4 74...
Page 244: ...8 469PC PROGRAM WAVEFORM CAPTURE 8 13 Figure 8 11 WAVEFORM CAPTURE...