9 - 16
MELSEC-A
9 MAIN POSITIONING CONTROL
Restrictions
(1) A 56.8ms error will occur in the current value update timing when the stored
"current feed value" and "machine feed value" are used in the control.
(2) The "current feed value" and "machine feed value" may differ from the values
set in " Da.5 Positioning address/movement amount" of the positioning data
if the movement amount per pulse is not set to "1".
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) command" from
the PLC CPU.
Buffer memory addresses
Axis 1
Axis 2
Axis 3
Md.29 Current feed value
800, 801
900, 901
1000, 1001
Md.30 Machine feed value
802, 803
902, 903
1002, 1003
Example
*
* Program in which the axis 1 current feed value is read to D104 and D105
*
Current feed
value read
command
* <Read current feed value to D104 and D105>.
Data register
for storing the
current feed
value
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Содержание A1SD75P1-S3
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