Siemens UL 489 - Page 175

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Control Bits and Extra Flags
Control Bits and Extra Flags make it possible for the Modbus RTU master to control various WL functions.
The Control Bits and Extra Flags are accessed using the following functions:
- 01 Read Coils
- 05 Write Single Coil
- 15 Write Multiple Coils
Byte Order
Data points larger than two bytes transmitted in the Motorola Format (Big-Endian).
Bit number WL
Control Bits
0, 1
Breaker open / close
00 = no action
01 = open circuit breaker
10 = close circuit breaker
11 = no action
2 clear reason for trip
3 Not used
4
User output
0 = User output Off
1 = User output On
5 Not used
6 Not used
7 Not used
Extra Flags 8, 9 not used
10 Clear log book
11 Clear all min/max values
12
Clear temperature
min/max values
13 Not used
14 Clear maintainance counters
15
Synchronize system clock at a rising edge
Sets the time to xx:30:00:00
Byte Order Type of Data
Byte 0 Byte 0 char,unsignedchar
Byte 1 Byte 1
Byte 0 High Byte signedint,unsignedint
Byte 1 Low Byte
Byte 0 High Byte High Word signedlong,unsignedlong
Byte 1 Low Byte
Byte 2 High Byte Low Word
Byte 3 Low Byte