Mitsubishi Electric Q01UCPU User Manual page 153

(2) Monitoring procedure
The following shows the local device monitoring procedure.
Connect a personal computer to the CPU module.
Display a program in ladder mode.
(3) Precautions
(a) Local devices that can be monitored/tested by a single programming tool
One programming tool can monitor or test local devices in one program at a time. Local devices in multiple
programs cannot be monitored or tested simultaneously.
(b) Number of programs that can be monitored/tested
Local devices in 16 programs can be monitored or tested simultaneously from multiple programming tools
connected to the RS-232 interface of the CPU module or the serial communication module.
(c) Monitoring local devices in a stand-by type program
When local devices in a stand-by type program are monitored, data in local devices are saved and restored.
For this reason, the scan time increases. (
(d) Monitoring local devices in a fixed scan execution type program
When local devices in a fixed scan execution type program are monitored, data in local devices cannot be
acquired and "0" is displayed.
(e) Clearing the PLC memory during local device monitoring
Local devices of monitoring programs are the target for the PLC memory clear operation during local device
monitoring.
Select [Online]
[Monitor] [Monitor mode].
Select [Local device monitor]
from the monitor window.
The local device of the
displayed program is
monitored.
Page 418, Section 6.2)
CHAPTER 3 FUNCTIONS
Switching to the
monitor mode
Setting of the local
device monitor
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