3. POSITIONING SIGNALS
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(7) Optional slot module error detection flag (M2047) ............... Signal from PCPU
to SCPU
This flag is used to determine whether the status of modules mounted on the
CPU base unit and extension base units is "normal" or "abnormal".
• ON................When mounted module is abnormal
• OFF ..............When mounted module is normal
The module information when the power is switched ON and module
information after the power has been switched ON is always checked and
errors are detected.
(a) When M2047 comes ON, the ERROR LED of the A273UHCPU lights.
"SL00 UNIT ERROR"
I/O slot No. (0 to 7)
Base unit No.
0: CPU base 1: Motion extension base
(b) Use the sequence program to execute appropriate processing (stopping
the driven axis, establishing the servo OFF status) when an error occurs.
(8) JOG simultaneous start command (M2048) .........Signal sent from SCPU to
PCPU
(a) When M2048 is turned ON, JOG operation is simultaneously started on the
axis for which JOG operation is to be executed as set in the JOG operation
simultaneous start axis setting register (D710 to D713).
(b) When M2048 is turned OFF, motion on the axis currently executing JOG
operation decelerates to a stop.
(9) All axes servo ON accept flag (M2049)......... Signal sent from PCPU to SCPU
The all axes servo ON accept flag serves to notify that servo operation is
possible.
• ON ........The servo motor can be driven.
• OFF ........The servo motor cannot be driven.
OFF
OFF
OFF
ON
ON
ON
ll axes servo ON
ccept flag (M2049)
ll axes servo ON
ommand (M2042)
ervo ON
(10) Start buffer full (M2050) ................................. Signal sent from PCPU to SCPU
(a) This signal comes on when 64 or more requests have been issued
simultaneously to the PCPU by means of position start (SVST) instructions
in the sequence program.
(b) Reset M2050 by using the sequence program.
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