Mitsubishi Electric MELSEC iQ-R User Manual page 48

• The following shows the operations of the flexible high-speed I/O control module when "Hardware logic control stop" is set
for "Hardware logic control selection during synchronization error occurrence" and a synchronization loss occurs.
Inter-module synchronization cycle
Inter-module synchronous interrupt program
Synchronization latch count value
(Un\G700 to Un\G715)
Latch timing of a count value with
the synchronization signal
Completion of reflecting the refresh result to
General command and User Address
Synchronous output
'Synchronization status monitor' (Un\G8173)
'Hardware logic control flag' (X4)
(1) A synchronization loss occurs because the flexible high-speed I/O control module failed to receive an inter-module synchronization signal.
(2) If the flexible high-speed I/O control module fails to receive the inter-module synchronization signal at the proper cycle, an inter-module synchronization
signal error (error code: 2610H) occurs, and Synchronization latch count value (Un\G700 to Un\G715) and the synchronous output are not refreshed. The
control of hardware logic stops.
(3) Even after the synchronization loss has occurred, the values of 'General command 0 to General command F' (Y10 to Y1F) and User Address in the
synchronous interrupt program are continuously reflected to the module.
When a synchronization loss occurs, the module may be affected by noise. Check and adjust the cable wiring
and the installation environment of the programmable controllers, and restart the system. If the above error
occurs again even after the adjustment, the possible cause is a failure of the module. Please consult your
local Mitsubishi representative.
Monitor
The inter-module synchronization status can be monitored when the inter-module synchronization function is used.
For details, refer to the following.
Page 245 Synchronization status monitor
Precautions
• The refresh timings of the X/Y signals and User Address (high speed area) differ depending on whether the inter-module
synchronization function is used or not. ( Page 16 Update timings of the X/Y signals and Hardware logic area)
• When "Select Inter-module Synchronization Target Module" is set to "Do not Synchronize" in GX Works3, the inter-module
synchronization signal is not input. Since the inter-module synchronization signal is not input, the High/Low states of
external output blocks for which "SYNC" is set for "Delay Time(Unit)" do not change.
1 FUNCTIONS
46
1.5 Inter-Module Synchronization Function
Inter-module synchronization cycle
Synchronous
Output Input
interrupt program
Latch count value 1
Output refresh
processing
Synchronous output 1 Synchronous output 2
Inter-module synchronization target (during synchronization) (2)
On: Hardware logic control in progress
(1)
Synchronous
Output Input Output
interrupt program
Latch count value 2
(2)
Output refresh
Output refresh
processing processing
Set value in "Error-time Output Mode"
Inter-module synchronization target (synchronization suspended) (1)
Off: Hardware logic control stopped
Synchronous
Input Output
interrupt program
Output refresh
processing
(3)