96 ACS 160 User’s Manual
Group 52: Standard Modbus
The ACS 160 features one serial link connector which can be used for control panel, for Modbus
communication and for other fieldbus adapters. When standard Modbus communication is used
parameters 5201 - 5203 are used to set up station number, communication speed and parity. An
adapter is required to connect the ACS 160 either to RS232 or to RS485 type bus (type code CFB-
RS).
It is also possible to connect the ACS 160 to other fieldbus systems, for example Profibus. For this
purpose a fieldbus adapter is required that is able to convert the external fieldbus protocol to the
standard Modbus protocol. Fieldbus communication modules of this kind are set up using Group 51
parameters.
Note! Modifications of parameters 5201 - 5203 take effect on the next power-up. Modification of
station number, communication speed or parity may cause the communication to control panel or
fieldbus adapter not to operate if they are connected after the drive is powered up. It is however
always possible to ensure that communication starts operating simply by turning the power off from
the drive, ensuring that the control panel or desired fieldbus adapter is connected, and then turning
the power on again.
Code Description
5201 STATION NUMBER
Sets the slave number for the ACS 160 in Modbus network.
Range: 1 - 247
5202 COMM SPEED
Defines the communication speed of the ACS 160 in bits per second (bits/s).
5203 PARITY
Defines the parity to be used with the Modbus communication. Parameter also defines the number of stop
bits. With Modbus communication, the number of stop bits is 2 with no parity bit, and 1 with even or odd
parity.
0 =
NONE
1 = EVEN
2 = ODD
5204 COMM FAULT TIME
Communication time out delay.
When communication link is lost after the time set by
COMM FAULT TIME, the communication fault function is
activated. Parameter 5205
COMM FAULT FUNC.
3 = 300 bits/s 48 = 4800 bits/s
6 = 600 bits/s 96 = 9600 bits/s
12 = 1200 bits/s 192 = 19200 bits/s
24 = 2400 bits/s
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