Performing A Database Rollback - Mitsubishi Electric MELSEC iQ-R Series Programming Manual

Performing a database rollback

DBROLBAK(P)
RnPCPU
RnCPU RnENCPU
(Process)
These instructions execute the rollback of the database corresponding to the specified identification number.
Ladder
(s)
FBD/LD
EN ENO
s d1
d2
■Execution condition
Instruction
DBROLBAK
DBROLBAKP
Setting data
■Description, range, data type
Operand Description
(s) Database identification number
(d1) Completion device (start device that turns on one scan
upon completion of instruction)
• (d1)+0: Completion signal
• (d1)+1: Error completion signal
(d2) Completion status
• 0000: Normal completion
• Other than 0000: Error completion (error code)
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L,
SM, F, B, SB,
FX, FY
(s) 
(d1) 
(d2) 
7 APPLICATION INSTRUCTIONS
984
7.21 Database Access Instructions
RnPCPU RnSFCPU RnSFCPU
(Redundant) (Standard) (Safety)
(d1) (d2)
Execution condition
Word
J\ T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD
 
 
 
ST
ENO:=DBROLBAK(EN,s,d1,d2);
ENO:=DBROLBAKP(EN,s,d1,d2);
Range
1 to 4




Double word Indirect
U\G, J\, Z LT, LST,
U3E\(H)G LC
  
  
  
Data type Data type (label)
16-bit signed binary ANY16
Bit ANYBIT_ARRAY
(Number of elements: 2)
Word ANY16
Bit BOOL
Bit BOOL
Constant
specification
LZ K, H E
  
  
  
Others
$
  
  
  