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Device Monitor Function Section 6-13
Reference: A communications error will occur if you use the Programming Console
function to change the communications settings (in the PLC Setup) that
govern the port to which the NT631/NT631C is connected. In this case, the
Programming Console function will be unusable.
6-13 Device Monitor Function
The NT31/NT31C has been equipped with the Device Monitor function which
can be used to change the PLC’s operating mode, read/change words in the
PLC’s data areas, and display the PLC’s error log of a CS/CJ-series PLC,
CPM1, CPM2A, CPM2C, CQM1, CQM1H, C200HX/HG/HE(-Z)E, or SRM1.
The Device Monitor can perform the following operations:
• Changing the PLC’s operating mode
• Displaying/changing the contents of words, displaying/changing the status
of bits, force-setting/force-resetting the status of bits (Registration Moni-
tor)
• Listing the contents of a range of words (Continuous Monitor)
• Displaying the error log and clearing errors (Error Log)
This section provides an overview of the Device Monitor function and explains
how to connect to the PLC. For more details, refer to 2-16 Device Monitor
Function in the Reference Manual.
!Caution Be sure that it is safe to proceed before using the Device Monitor function to
perform one of the following operations from the PT.
Changing monitored data
Switching the PLC’s operating mode
Force setting or force resetting bits
Changing PVs or SVs
Reference: • The Device Monitor function can be used with Ver. 3.0 and higher ver-
sions of the PT system program only.
• The Device Monitor functions are almost identical to the functions of the
Data Access Console (DAC).
• The Device Monitor function cannot be used with host link or memory link
communications.