SUPPORTED MODBUS FUNCTIONS
6. COMMUNICATIONS
6-4
6.2.5
TIMING
Data packet synchronization is maintained by timing constraints. The receiving device must measure the time between the reception of
characters. If three and one half character times elapse without a new character or completion of the packet, then the communication
link must be reset (i.e. all slaves start listening for a new transmission from the master). Thus at 9600 baud a delay of greater than 3.5 *
1/9600 * 10 = 3.65 ms will cause the communication link to be reset.
6.3 SUPPORTED MODBUS FUNCTIONS
6.3.1
SUPPORTED MODBUS FUNCTIONS
The following functions are supported by the SR469:
01 - Read Relay Coil
02 - Read Digital Input Status
03 - Read Setpoints and Actual Values
04 - Read Setpoints and Actual Values
05 - Execute Operation
06 - Store Single Setpoint
07 - Read Device Status
08 - Loopback Test
16 - Store Multiple Setpoints
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...