iPAK2 User Guide
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6. Modbus
Both MODBUS TCP/IP (Ethernet) and MODBUS RTU (RS485) protocols are supported. Modbus TCP/IP uses
port 502.
To have the Modbus connection activate the inputs to the welding control, access the control
configuration parameters (using WSP3, touch- screen or NetFlash) and select
I/O SOURCE: COMn
where n = desired port (see table below).
Protocol Cable connected to Port
MODBUS-TCP/IP RJ45 on iPAK2 (-TS) COM1
RJ45 on EtherNet/IP adapter card COM5
RJ45 on iPAK2v2 (-TS) COM5
MODBUS-RTU DSUB9 (RS485) COM2
Restart the control.
This setting only affects the inputs and outputs. Parameter access is always available, even if I/O Source
is set to something other than a Modbus port.
6.1. Access types
Write inputs or parameters using MODBUS function code 16
Read outputs or parameters using MODBUS function code 3
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