Special Register (Sd) List - Mitsubishi Electric MELSEC-Q Series Programming Manual

Special Register (SD) List

The following table lists the special registers that can be used in the SFC programs.
Number Name
SD90 Step transition
monitoring timer setting
value (Corresponding
to SM90)
SD91 Step transition
monitoring timer setting
value (Corresponding
to SM91)
SD92 Step transition
monitoring timer setting
value (Corresponding
to SM92)
SD93 Step transition
monitoring timer setting
value (Corresponding
to SM93)
SD94 Step transition
monitoring timer setting
value (Corresponding
to SM94)
SD95 Step transition
monitoring timer setting
value (Corresponding
to SM95)
SD96 Step transition
monitoring timer setting
value (Corresponding
to SM96)
SD97 Step transition
monitoring timer setting
value (Corresponding
to SM97)
SD98 Step transition
monitoring timer setting
value (Corresponding
to SM98)
SD99 Step transition
monitoring timer setting
value (Corresponding
to SM99)
SD329 Online change (inactive
block) target block
number
*1 Available with the Universal model QCPU other than the Q00UJCPU, Q00UCPU, Q01UCPU, and Q02UCPU, whose serial number (first
five digits) is "12052" or later. Available with the LCPU other than the L02SCPU, L02SCPU-P, L02CPU, and L02CPU-P, whose serial
number (first five digits) is "15102" or later.
Meaning Explanation
Timer set value and F • Set the set time of the step transition
No. at time-out watchdog timer and the annunciator
No. (F No.) that will turn ON at time-out
of the watchdog timer.
• The timer starts when any of SM90 to
SM99 is turned ON during an active
step, and the set annunciator (F) turns
ON if the transition condition following
the corresponding step is not satisfied
within the timer time limit.
SFC block number • While online change (inactive block) is
executed (SM329 is on.), this register
stores the target SFC block number.
• In other than the status above, this
register stores FFFFH.
Set by Corresponding CPU
(When set)
(1)
U 

S (Status
change)
Appendix 1 Special Relay and Special Register List
(2) (3) (4) (5)
   
A
   
*1
APPENDICES
179