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3. POSITIONING SIGNALS
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(8) Speed change flags (M2021+n).......... Signal from PCPU to SCPU
The speed change flags come ON when a speed change is executed in
response to a control change (DSFLP/CHGV) instruction in the sequence
program: use them for interlocks in speed change programs.
Speed change command
DSFLP instruction
Speed change flag
Set speed
REMARK
A numerical value corresponding to an axis number is entered for "n" in
"M2021+ n".
<A172SHCPUN>
Axis No.
1
2
3
4
5
6
7
8
(9) PC link communication error flag (M2034) ........... Signal sent from PCPU to
SCPU
This flag comes ON when an error occurs during personal computer linking
communication.
OFF : No PC link communication error
ON : PC link communication error detected
(Flag changes to OFF if normal communication is restored.)
For details on PC link communication error, see APPENDIX 2-5.
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ON
OFF
Delay due to sequence program
ON
OFF
0 ` 4 ms
Speed change completed
<A171SHCPUN>
n
Axis No.
0
1
1
2
2
3
3
4
4
5
6
7
3 − 24
Speed
Speed after
speed change
t
n
0
1
2
3
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