37
1SDH000760R0002, L4106
Installation and operating instructions, ATS022
8. Using automatic transfer switch ATS022
Figure 8.25 Alarm Log: 20 latest alarms, Clear Log will empty the log
8.2.4 Communication via Modbus
An RS485 link is used to connect ATS022 with a PC or a PLC over a distance of 500 meters using
Modbus protocol:
RS485 2 or 3 wires half duplex
Protocol Modbus in RTU mode
Speed 2400, 4800, 19200, 38400 Bauds
Galvanic insulation 4 kV (1 min 50 Hz)
Table 8.4 ATS022 communication with a PC or a PLC
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