socomec ATyS p M - Communication Features; COMM Menu and Modbus Protocol

65
EN
ATySpM - 542935E - SOCOMEC
13.9. Communication (optional 9383xxxx units only)
13.9.1. COMM Menu
12
Variable Definition Adjustment range Default value
12
Address Address of the device 1 to 255 5
12
Speed Communication speed
2400, 4800
9600, 19200
38400
9600
12
Stop bit 1, 2 1
12
Parity NO, ODD, EVE NO
Only available on ATyS p M version with Comm.
RS485 2 or 3 wire half-duplex
Protocol MODBUS® protocol in RTU Mode
Speed 2400, 4800, 9600, 19,200, 38,400 Bauds
Galvanic insulation 2.5 kV (1 min 50 Hz)
13.9.2. General Information
Communication via an RS485 connection (Modbus
®
protocol) enables you to connect up to 31 ATyS to a PC or a
programmable logic controller over a distance of 1200 metres.
• Recommendations
You should use a shielded twisted pair (LIYCY type).
If the distance of 1200 m and / or the number of 31 ATyS is exceeded, it is necessary to connect a repeater to enable
an additional connection of ATyS over more than 1200 m. For further information on the connection methodology,
please consult us.
N 1 N 2 N n
R = 120 Ω
1200 M or 32 UL
R = 120 Ω
PLC
Other systems
N 1
R = 120 Ω
repeater
RS485
+ - - +
N n
R = 120 Ω
max 1200 M or 32 UL max 1200 M or 32 UL
PLC
Other systems
R = 120 Ω R = 120 Ω
It is essential to have a 120 ohm termination at both ends of the bus. This termination is selectable on
the ATySpM close to the RS485 connection terminal.