Datasheet

Page 8 - 51029066EN/BB
1.3 Functions
1. Presentation
The JBUS/MODBUS communication card provides UPS (Uninterruptible Power Supply) and STS (Static Transfer Switch)
data (states and measures) to be sent a computer system.
The JBUS hexadecimal (MODBUS RTU) communication protocol is used in slave mode.
The system provides a communication channel with an RS485 or RS232 interface.
Note:
◗ The JBUS/MODBUS communication card may be used in all UPSs and STSs equipped with UPS BUS communication slots.
◗ Under specific constraints for a restricted use, the card can be inserted in a MultiSlot product. Please contact MGE UPS
SYSTEMS Software Support to make sure your configuration is operational.
◗ 2 wires or 4 wires RS485 link are available.
Warning:
◗ RS232 and RS485 communication ports cannot be used together.
◗ JBUS/MODBUS communication is operational 2 minutes after the startup of the card.
1.4 Technical characteristics
Functions
JBUS/MODBUS
communication
RS232 link
RS485 link
Parameters
- Baud rate
- Parity
- Slave number
- Link connection in transmit
data (Tx) or receive data (Rx)
- Polarity
- Termination
Default values
- 1200 bauds
- without parity
- Slave nr 1
- Rx on pin 3
- Tx on pin 2
- No polarity
- No termination
Possible values
- 1200, 2400, 4800, 9600
- Without parity, even parity
- 1 to FF (hexadecimal)
- Rx on pin 3 or on pin 2
- Tx on pin 2 or on pin 3
- With or without (2 or 4 wires)
- With or without (2 or 4 wires)
Note: The JBUS/MODBUS communication format is 8 data bits and 1 stop bit. It is not configurable.