1. MODBUS Protocol 1 Communications interface 2 Bits per Byte All Used in RTU mode, the default Bits per Byte listed as followed. START 1 2 3 4 5 6 7 8 STOP 3 Communication rate The default is 9600BPS. 4 Data Format A ll values with two bytes, the highest bit indicates sign if it’s a temperature.(0 for positive and 1 for negati v Category Conversio n method Unit Cell Voltages /1000 V Cell Resistance /1 u Ω Temperature /10 °C 5 Address Each module with a address which can be set in the register 400015. Communicates over a RS485 port on the converter. The port on the CELLCHECK module is a UART port which can not be communicated with a device directly.

2. Register Map Category Name Reference Data Address Default Value Remarks Firmware Firmware Version 400001 0000H 4 0A0H Cell Voltage 400002 0001H - Cell Temperture 400003 0002H - ------ 400004 0003H - Reset 400012 000BH 0 Sets the value to 0xF0F0 ， the module will perform a reset. ------ 400013 000CH - ------ 400014 000DH - Module Address 400015 000EH 1 The default address is 1. ------ 400016 000FH ------ 400017 0010H ------ 400018 0011H Module Type 400019 0012H 2 2 ： 2V ， 6 ： 6V,12 ： 12V ------ 400020 0013H - ------ 400021 0014H - Baut Rate 400022 0015H 96 The default value is 9600BPS. ------ 400023 0016H 3 ------ 400024 0017H - ------ 400025 0018H - ------ 400026 0019H - ------ 400027 001AH - ------ 400028 001BH 1 LED Control 400029 001CH 0 sets the value to 1 ， the blue LED will be on for 1 second and off for 1 second. 400030 001DH - Data Commands Parameters