Bender A-ISOMETER IRDH375 - BMS Master; Commissioning BMS Network

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Interface
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
BMS Master
If the bus address 1 has been selected, this IRDH375B automatically represents
the Master, that means that all addresses between 1 and 30 are scanned for
warning and operating messages via the RS485 bus. If the Master receives no
answer from 5 subsequent addresses, the scanning will be restarted. If the Master
recognizes incorrect answers from a Slave, the fault message „fault RS485“ is
issued by the Master.
Faults may occur when:
- addresses are assigned twice
- RS485 bus lines are reversed at terminal A/B
- interference signals on the bus lines
- a defective device is connected to the bus
- terminating resistors are not switched on
Commissioning of the BMS network
- Interconnect the terminals A and B of all network nodes in one line
- Switch the terminating resistors on by means of the switch S1 = On at the
beginning and the end of the line
- Switch on the supply voltage
- Select one IRDH375B as the Master and assign address 1
- Assign the addresses (2...30) subsequently to all other IRDH375B
- Check whether a flashing spot appears on all other devices
(BMS commands are being received)
- In the „Bus Monitor“ menu all preset Slave addresses can be checked for
correct data transmission