IMP Pumps NMTC module - Manual (Page 31)

31
-
Startup diagnosis (shows a chain of numbers and represents information for service personnel)
In the Current error and Last error row, next to the error number there is a link, which redirects you to
the reference error list.
Error Page
Here, error descriptions are given for the corresponding blink/error code. Next to the descriptions,
probable causes and solutions to the problem are given.
See user manual for error descriptions
Help Page
This page redirects you to www.imp-pumps.com, where software updates and manuals will be
available.
7 Modbus
7.1 Modbus related interface
Designation Description
MODE Can be used to reset network configuration
LED2 / ACT Indicates Ethernet activity or Modbus reception.
B/D- RS-485 negative data signal for Modbus.
A/D+ RS-485 positive data signal for Modbus.
COM/0V RS-485 common and analog input common (ground).
7.2 Bus topology
NMTC is a Modbus slave, connected directly to a Modbus RTU network. Connection can be made in
either daisy chain style (if cabling allows such a connection) or a limited length passive tap. Schematic
example is in Figure 7.