Hardware manual

Monitoring the PLC Ladder Programs on a Display
PLC Ladder Monitor Operation Manual
2-6
3) Select [Select Shape], [Color], [Label], and any other features you require and click OK.
 Using an LS Area Bit to Start Up
1) The Ladder Monitor starts up if you turn ON bits in the LS area. Configure the settings for
turning ON the following bits using switch parts and D-scripts.
• Read the cache from a CF Card
Normally, every time you start the Ladder Monitor, it communicates with the
PLC to read the ladder programs and it may take time to display the ladder
programs. To improve the display update speed, the Ladder Monitor feature
reads the PLC ladder programs onto the device CF Card (cache) first and
then displays them.
If you change the ladder programs on the PLC after reading the PLC ladder
programs to the display CF Card, read the ladder programs to the CF Card
again. In [Main Screen] on the GP, select [Read].
) “3.1 Main Screen” (page 3-2)
• To speed up the comment file display speed, create the following folder on the
CF Card to copy the project comment file (∗.WCD) created with the GX-
Developer programming tool by Mitsubishi Electric. This saves reading on the
PLC and allows for faster reading.
) “3.2 File Selection Screen” (page 3-4)
Q Series CPU direct : “PLCLDMON\MIT_QCPU”
Q/QnA Series Ethernet : “PLCLDMON\MIT_QETH”
Bit 1 Turn ON to start up the Ladder Monitor.
Bit 3
Turn ON to start the Ladder Monitor and display the ladder programs
cached on the CF Card.
• If the programs are not cached in advance, the bit only triggers the
same action as Bit 1 turning ON (starts up the Ladder Monitor). To
update the ladder programs on the CF Card, in [Main Screen] on the
GP, select [Read].
) “3.1 Main Screen” (page 3-2)
• Bits other than Bits 1 and 3 are reserved. Do not use them.
Reading to the CF Card (cache)
LS2078
15 1 2 3
Reserved
1: Starting up the Ladder Monitor
Reserved
1: Reading the cache data
Reserved