Mitsubishi Electric M800VW Series Programming Manual page 131

M800V/M80V Series PLC Programming Manual (1/2)
6 Explanation of Instructions and Functions
6.4 Index Modification
Restrictions of modification
Index modification has following restrictions
 Invalid devices for modification
Devices in following table are invalid for modification.
Device
K,H 32-bit constant (16-bit constant is available for modification) (*1)
Bit designation of word device
□ . □
P Pointer as a label
N Master controller nesting level
Z Index register
T,ST Setting value of timer
C Counter set value
(*1) Constant designation of rotation instruction except for DSFR(P)/ DSFL(P) is invalid for modification.
 Devices with restriction for index register usage
Device
 Only Z0 and Z1 can be used for timer contact
point.
T
 Not available for timer coil.
 Only Z0 and Z1 can be used for counter con-
tact point.
C
 Not available for counter coil.
(Remark)
No restriction of index register No. for current value of timer and counter.
 Index modification on digit-designated bit device
Digit-designated bit device can be executed modification.
Digit-designated itself cannot be executed modification.
IB-1501667-B
Description
Description
Timer set value
(Invalid for index qualification)
Timer current value
Counter set value
(Invalid for index qualification)
Counter current value
Setting is valid due to an index
qualification is applied to device No.
When Z2=3, X(0+3)=X3.
Setting is invalid due to an
index qualification is applied to
digit designation.
Examples
T0Z0 T0Z0 K100 K100
T1Z1 T1Z1
C0Z1 K100
C1Z0
110