16 MULTIPLE CPU SYSTEM FUNCTION
16.4 Data Communication Between CPU Modules
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16
Executing refresh
Refresh is executed when the CPU module is in RUN and/or STOP (PAUSE) state. For details on the behavior when the CPU
module is in stop error state, refer to CPU module operation upon error detection setting. ( Page 129 CPU module
operation upon error detection setting)
■Behavior during the multiple CPU synchronous interrupt program (I45) execution
If refresh is set to be performed during the multiple CPU synchronous interrupt program (I45) execution, the refresh behavior
when the CPU module is in RUN state varies depending on either of the following conditions. ( Page 316 Multiple CPU
Synchronous Interrupt)
• A program (I45 to IRET) which includes the multiple CPU synchronous interrupt program (I45) exists.
• Event execution type program exists.
The following table lists the refresh behaviors.
: Execute refresh, : Not execute refresh
*1 The PSCAN/PSTOP instruction changes after the next scan, and the POFF instruction changes after the next two scans.
: Execute refresh, : Not execute refresh, : Execution disabled
*2 Not affect to the behavior.
*3 Operates with the pre-change parameters.
*4 Operates with the post-change parameters.
Configurable data
This section lists the configurable data with the refresh settings.
■Maximum number of settings
Maximum of 32 settings can be configured per CPU module for any refresh setting.
■Data number of points
Data number of points can be configured within the number of points assigned to the area (within the send range of the fixed
scan communication area) in increments of two points. Device duplication between multiple setting numbers is not allowed.
■Data that can be specified
The device other than local device can be specified. However, when "Use File Register of Each Program" is enabled, file
registers cannot be specified. Doing so may prevent the device from operating at file registers for each program depending on
the CPU operating status.
*1 This device can be specified only in units of 16 points (one word).
Execution type Refresh behavior Refresh behavior after the program
control instruction is executed
STOP state RUN state RUN state
Other than event execution type The I45 interrupt pointer doesn't exist
The I45 interrupt pointer exists
Event execution type (I45 interrupt specified) (stop after changing the execution type
*1
)
Execution type Refresh behavior triggered by operating status change of the CPU module
RUN
state
Upon addition
of the I45
interrupt pointer
during online
program change
Upon removal
of the I45
interrupt pointer
during online
program change
RUN
to
STOP
state
STOP
state
After the refresh
setting is
changed; when
parameters are
written
STOP to RUN
state; turning
power off and
on; resetting
Other than
event execution
type
The I45 interrupt
pointer doesn't exist
*3
The I45 interrupt
pointer exists
*2
*3
*4
Event execution type (I45 interrupt
specified)
*2
*3
*4
Type Devices that can be specified
Bit device
*1
X, Y, M, L, B
Word Device D, W, R, ZR, RD
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