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Chapter 9 Major Positioning Control
Monitoring the current value
The "current feed value" and "machine feed value" are stored in the following
buffer memory addresses, and can be read using a "DFRO(P) instruction" or
"DMOV(P) instruction" from the PLC CPU.
Buffer memory addresses
QD77MS2/QD77MS4 QD77MS16
Md.20
Current feed value
800+100n
801+100n
2400+100n
2401+100n
Md.21
Machine feed value
802+100n
803+100n
2402+100n
2403+100n
(1) The following shows the examples of programs to read out the current feed
value of the QD77MS4 [axis 1] to D104 and D105 when X40 is turned ON.
(a) For the DFRO(P) instruction
X40
K800 D104 K1H0DFRO
(b) For the DMOV(P) instruction
X40
DMOV
U0\
G800
D104
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