User guide

MDX-ETHERNET User Guide 51
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13.7 Supported Modbus function codes
Table 13.7 below, details the supported Modbus function codes on MDX-ETHERNET.
Table 13.7 Supported function codes
13.8 Network loss trip
The network loss trip provides a method on the drive to ensure that communication with
the master is still present. The MDX-ETHERNET resets an internal timer when a valid
message is received from the MDX-ETHERNET network, if a message is not received
within the specified period in ms, the network loss trip is triggered. If the trip is generated
by MDX-ETHERNET, the trip display on the drive will be "TR 94". The MDX-ETHERNET
error code parameter (Pr 15.50) will show "Fieldbus loss" when a network loss trip has
occurred.
Code Description
FC1 Read Coils
FC2 Read Discrete Inputs
FC3 Read holding Registers
FC4 Read Input Registers
FC5 Write Single Coil
FC6 Write Single Register
FC15 Write Multiple Coils
FC16 Write Multiple Registers
FC23 Read/Write Multiple Registers
Network loss trip timeout
Pr 15.07
Default 1000
Range 0 to 10000
Access RW
The network loss trip can be disabled by setting Pr 15.07 to 0. In this case, the drive will
continue to operate using the last received values. It is the user's responsibility to
ensure that adequate safety precautions are taken to prevent damage or injury by
disabling the drive in the event of a loss of communications.
WARNING