Mitsubishi Electric MELSEC iQ-R Series User Manual page 199

• STMR instruction
If an STMR instruction exists within the range to be changed, the STMR instruction will be executed.
M10 is added at the online change.
M0
1
STMR T0 K10 M100
M20
2
STMR T1 K10 M200
Online change completion
END 0
ON
M0
OFF
ON
M10
OFF
ON
M20
OFF
ON
1
OFF
STMR
instruction
ON
2
OFF
STMR
instruction
(1) The STMR instruction functions because the STMR instruction is included in the ladder block where the online change has been executed.
(2) The STMR instruction does not function because the STMR instruction is not included in the ladder block where the online change is executed.
(3) The instruction functions even when M0 and M10 are off.
(4) The instruction does not function.
■Initializing the last execution if the ladder at the online change (ladder block) has an FB call
If a subroutine type FB is called within the changed ladder block, information of the last execution, such as the rising
instruction and the falling instruction within the FB definition of the called subroutine type FB, is not initialized.
■When the start-up of an interrupt program is delayed
When the online change (ladder block) is performed, the start-up of the interrupt program may be delayed. Therefore, when
the execution time is monitored for the interrupt program that uses the inter-module synchronous interrupt (I44) and multiple
CPU synchronous interrupt (I45), an error may be detected in the CPU module. ( Page 203 Error detection setting)
■Scan monitoring function during online changes
Some sections are not targeted for the scan monitoring while online changes are being performed, and therefore a WDT error
may not be detected if the scan time set in the scan time monitoring time (WDT) setting is exceeded.
■Increase in scan time of the online change (ladder block)
When global labels and local labels are added, or when there are many programs and FB files to be changed or many
changes, the scan time may be increased by several dozen milliseconds.
■Online change (ladder block) of when another function is performed
The online change (ladder block) cannot be performed during execution of the following functions. Check that the following
functions are not being executed and then perform the online change (ladder block).
• CPU module data backup/restoration function
• iQ Sensor Solution data backup/restoration function
(1)
M0 M10
1
STMR
M20
2
STMR
(2)
M0 M10
STMR T0
M20
STMR T1
END 0 END 0
1 scan
(3)
(4)
T0 K10 M100
T1 K10 M200
K10 M100
K10 M200
14 WRITING DATA TO THE CPU MODULE
14
197
14.3 Precautions