Pulsar blackbox 134, Instruction Manual

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Modbus Functions
Function 1: Read Output Status
Registers Address Description Data Type Unit/Range
00001 – 00006 Relay status Bit mapped None
Note
1. Bit value of 1 represents an ACTIVE STATE of the
corresponding relay.
2. Bit value of 0 represents an IN-ACTIVE STATE of the
corresponding relay.
Example: Query: reading relay 2 to 4
Slave address 11
Function 01
Addr Hi 00
Addr Lo 02
No. of points hi 00
No. of points lo 03
Error check
Response: relay 2 = on, relay 3 = off, relay 4 = on
Slave address 11
Function 01
Byte count 01
Data (coil 2-4) 0a
Error check