User`s manual

6-26
6-6 Description of details displayed on screen when displaying ladder
monitor
(1) Upper zone of the display area is for displaying ladder program.
When a correct ladder circuit is searched, the LCD control terminal displays the ladder circuit and
highlights the coil and enters into the circuit monitor operation.
(2) At the lower zone of the display area, the LCD control terminal displays information of cursor high-
lighted position.
They are program address, relay number (coil/TMR/CNT/FUNCTION), and symbol/comment (only
when message is set for symbol/comment data) from the left to right.
(3) If the LCD control terminal could not search a coil properly, it displays any of the messages below at
lower end of the display area.
Table of display message
[Before use]
When connecting the LCD control terminal to a PG port of a control module, the following error may
occur. In this case, turn OFF the memory protect switch of the control module.
- Error details: "Communication error: Receive code 27"
Message description Description
NETWORK NOT FOUND - Specified coil number could not be found in the program.
- Check the coil number again.
INSTRUCTION READ ERROR - Failed to read an instruction.
-Aladder circuit may have fault.
- Check the circuit.
LADDER NETWORK CANNOT
DISPLAY
- Ladder circuit cannot be displayed.
- The program has a fault that ladder circuit cannot be
established.
- Recheck the circuit.
NETWORK DATA SIZE OVER - Capacity of one network is exceeded.
- Review the circuit.