External Signal Selection Function - Mitsubishi Electric MELSEC-Q Series User Manual

14.4 External signal selection function

Setting item
[Pr.80]
The "external signal selection function" is used to select from the following signals
when using the upper/lower limit signal and proximity dog signal.
• External input signal of servo amplifier
• External input signal via CPU (buffer memory of QD77GF)
When the external input signal via CPU (the buffer memory of QD77GF) is used, the
external input signal status of Simple Motion module can be operated by connecting
the limit switch to input module and by operating the buffer memory of sequence
program. When the external input signal via CPU (the buffer memory of QD77GF) is
used, operation is affected by the PLC scan time.
The details shown below explain about the "External signal selection function".
[1] Parameter setting details
[2] Precautions during parameter setting
[3] Control details
[4] Program example
[1] Parameter setting details
The setting details of the "External signal selection function" are shown in the
following table.
Setting value
External
input signal 1
selection
(1) When "1: External input signal of servo amplifier" is set, set the Pin No. of
external input signal of servo amplifier shown in the following table.
For using a servo amplifier other than the following, refer to each equipment
manual for details on specifications.
*1
Pin No.
CN3-19 (DI3)
CN3-12 (DI2)
CN3-2 (DI1)
Buffer memory
1: Refer to the "Servo Amplifier Instruction Manual" for details on the pin No.
of servo amplifier.
2: The stop signal cannot be input from the external input signal of servo
amplifier. To input the stop signal, set "[Cd.44] External input signal
operation device". For setting details, refer to Section 5.7.1 "System control
data".
Setting details
Set the external signal selection.
1: External input signal of servo amplifier
2: Buffer memory of QD77GF
Signal name
DOG
LSN
LSP
*2
STOP
14 - 7
Chapter 14 Common Functions
Buffer memory
32+150n
n: Axis No.-1
address