Surefire BMS-350, Installation And Operation Manual

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52
MODBUS INFORMATION
Time
step
Master's action BMS-350 action Registers
26
Polls command status register.
Sees OK (0x01). Proceeds to
next step.
40010 (status) 0x01
40011 (cmd) 0x04
40012 (param) 0x7D
40013 (exec) 0x01
27
Write 0x00 to command exec
reg.
40010 (status) 0x01
40011 (cmd) 0x04
40012 (param) 0x7D
40013 (exec) 0x00
28
Sees command exec register with
zero value. Returns to idle state.
40010 (status) 0x55
40011 (cmd) 0x04
40012 (param) 0x7D
40013 (exec) 0x00
29 Polls command status register.
Sees IDLE (0x55). All done!
40010 (status) 0x55
40011 (cmd) 0x04
40012 (param) 0x7D
40013 (exec) 0x00
6.0 DIP switch configuration and settings
Switch SW1 on the Modbus board configures the Modbus address, baud rate, and selects the serial interface to
be used. The notation “ON” and “OFF” follows from the direction of the arrow and the word “ON” located on
the left side of the switch body near SW1-1. The switches are as follows:
Make sure at the receiving end, the following bits are set as:
Data Bit = 8
Parity Bit = None
Stop Bit = 1
Switch Selects Description
SW1-1 Modbus address bit 0 “ON” position is “1”, “OFF” is 0
SW1-2 Modbus address bit 1 “ON” position is “1”, “OFF” is 0
SW1-3 Modbus address bit 2 “ON” position is “1”, “OFF” is 0
SW1-4 Modbus address bit 3 “ON” position is “1”, “OFF” is 0
SW1-5 Modbus address bit 4 “ON” position is “1”, “OFF” is 0
SW1-6 Baud rate for communication with Modbus master “ON” is 19200, “OFF” is 9600
SW1-7 Unused Unused
SW1-8 Interface for communication with Modbus master “ON” is RS232, “OFF” is RS485