Mitsubishi Electric MELSEC-Q/L - Batch Save of Index Register, Batch Recovery of Index Register

766
7 APPLICATION INSTRUCTIONS
7.19 Other Instructions
Batch save of index register, batch recovery of index register
ZPUSH(P), ZPOP(P)
Processing details
■ZPUSH
• Saves the contents of the following index registers to after the device specified by (D). (When contents of an index register
are saved, (D)+0 (the number of saves made) is increased by 1.)
• The ZPOP instruction is used for data recovery. Nesting is possible within the ZPUSH to ZPOP cycle.
• If nesting has been done, each time the ZPUSH instruction is executed, the field used following (D) will be added to, so a
field large enough to accommodate the number of times the instruction will be used should be maintained from the
beginning.
• The composition of the field used following (D) is as shown below:
(D): Head number of the devices to/from which contents of an index register are saved/recovered (BIN 16 bits)
Setting
data
Internal device R, ZR J\ U\G Zn Constant Others
Bit Word Bit Word
(D)  
• Basic model QCPU: Z0 to Z9
• High Performance model QCPU/Process CPU/Redundant CPU: Z0 to Z15
• Universal model QCPU/LCPU: Z0 to Z19
• When Basic model QCPU is used
Basic
Process
High
performance
Redundant Universal LCPU
Command
Command
P
D
D ZPUSHP, ZPOPP
ZPUSH, ZPOP
indicates an instruction symbol of ZPUSH/ZPOP.
Z0
Z1
Z9
Z0
+1
+2
+10
+11
+15
+16
+17 Z1
(D)+0
·
·
Number of saves
Reserved by the
system (5 words)
1st nesting
(15 words for the 1st nesting)
2nd nesting