M800/M80/E80 Series Maintenance Manual
4 Failure Diagnosis
112
IB-1501273-F
4.9.2 Safety Observation Screen (Signal Monitor)
The signal monitor screen displays the safety PLC signal status. The safety PLC signal displays both of the duplex PLC
signals to identify the incongruous state. With the initial display, the input/output signal status from the device "X0000" is
displayed on the left side and the input/output signals from the device "Y0000" is displayed on the right side.
Note that because time differences occur between the PLC signal change and the signal display, there may be a delay in
the display. The machine may also not be able to correspond to extremely brief signal changes.
Display items
Display items
Details
(1)
Device No. and input/out-
put signal value (binary/
hexadecimal display)
This displays the duplex safety PLC signals (A, B) from the designated device No.
in order.
The input/output signal is displayed in binary and hexadecimal (bitwise).
The device to be displayed can be switched individually for the left area and right ar-
ea. The operation target (right or left) can be switched with the
and
keys.
The head device and the operation target area are held until the power OFF.
The displayable devices are X, Y, and ZR.
If there is a comparison error with duplex safety PLC signals, the background color
becomes yellow.
List of displayable PLC devices
Devices
Device No.
No. of points
Units
Details
X
X0 to X1FF
512
1-bit
Input signals to PLC, machine input, etc.
Y
Y0 to Y1FF
512
1-bit
Output signals from PLC, machine output, etc.
ZR
ZR0 to ZR3071 3072
16-bit
File register, CNC word I/F
(1)
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