ACS 400 User’s Manual 133
Communication settings
Communication settings define the communication speed, parity checking, number of stop bits and
fault functions. These settings for Channel 1 are defined using parameters in groups 50
COMMUNICATION and 52 STANDARD MODBUS.
The default communication settings for Channel 1 are listed in Table 13. To be able to communicate
with the master device, the ACS 400 must use the same communication speed and parity settings
as the master.
Further information on all the parameters and their alternative settings is given in “ACS 400
Complete Parameter List” on page 65.
Table 14 Communication parameters.
Code Parameter Name
Alternative
Settings
Default Setting Function/Information
Group 52
STANDARD MODBUS
5201
STATION NUMBER 1 - 247 1 Slave number for ACS 400 in
Modbus network.
5202
COMM SPEED 3 = 300 bps
...
192 = 19200 bps
96 (9600 bits/s) Communication speed.
5203
PARITY 0 = NONE
1 = EVEN
2 = ODD
0 (
NONE) Parity and stop bit setting.
Group 50
COMMUNICATION
5003
COMM FAULT TIME 0.1 - 60.0 s 1.0 s Time limit for communication loss
detection.
5004
COMM FAULT FUNC 0 = NOT SEL
1 = FAULT
2 = CONST SP 7
3 =
LAST SPEED
0 (NOT SEL) Operation in case communication
with the master device is lost.
5005
PROTOCOL SEL 0 = NOT SEL
1 = DDCS
2 = STD MODBUS
3 = STD MDB+DDCS
0 (NOT SEL) Communication protocol selection.
Normally must be set to
STD
MODBUS.
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