Supplementary Cyclic Settings - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Supplementary Cyclic Settings

Set the link scan mode, station-based block data assurance, and I/O maintenance setting.
Item
System Switching Monitoring Time
Link Scan Mode Link Scan Mode
Constant Link Scan Time
Station-based Block Data Assurance
I/O Maintenance Settings Output Hold/Clear
Setting during CPU
STOP
Data Link Error Station
Setting
Output Mode upon CPU
Error
*1 When sequence scan takes much time than link scan, input transmission delay time will become longer.
*2 The sequence scan must be constant as well. Set "Constant Scan Setting" in "RAS setting" of "CPU Parameter".
*3 When "Link Scan Mode" is set to "Constant Link Scan", enter values within the ranges.
Description
When the network contains a redundant system,
set the time (in increments of 5ms) from when any
of the system switching causes below arises until
a system switching request is issued. This setting
is available only for the master station and
submaster station.
• Data link stop ('Data link error status of own
station' (SB0049) is on.)
• Detection of error in communication with
system switching monitoring target station (for
redundant master station configuration only)
• Detection of error in slave station (only in
redundant line configuration)
Select a link scan mode.
■Sequence Scan Asynchronous
Link scan is performed asynchronously with the
sequence scan of the CPU module. Select this
item to shorten input transmission delay time
when sequence scan takes much more time than
link scan. Note that output transmission delay time
will become longer.
■Constant Link Scan
Cyclic transmission is performed punctually. Link
scan time will be the constant link scan time
specified in "Constant Link Scan Time". However,
when the actual link scan time is longer than the
specified link scan time, cyclic transmission is
performed by actual link scan time.
■Sequence Scan Synchronous Setting
Link scan is performed synchronously with the
sequence scan of the CPU module. Select this
item to shorten output transmission delay time or
to keep transmission delay time constant.
Set the constant link scan time when "Link Scan
Mode" is set to "Constant Link Scan".
Select whether to ensure a data integrity of the
data blocks being refreshed between the master/
local module and the CPU module. ( Page 23
Cyclic data integrity assurance)
Select whether cyclic data output is held or
cleared when the CPU module mounted with the
master/local module is set to STOP state. (
Page 32 Output status setting for CPU STOP)
Select whether to hold or clear data input from the
slave station where a data link error has occurred.
( Page 31 Input and output status settings
when failure occurs)
Select whether to hold or clear data output from
the master/local module when the CPU module is
in stop error. ( Page 31 Input and output
status settings when failure occurs)
Setting range
5 to 5000ms
(Default: 2000ms)
• Sequence Scan Asynchronous
• Constant Link Scan
• Sequence Scan Synchronous Setting
(Default: Sequence Scan Asynchronous)
*1*2
1ms to 200ms
*3
(Default: 0ms )
• Enable
• Disable
(Default: Enable)
• Hold
• Clear
(Default: Hold)
• Clear
• Hold
(Default: Clear)
• Clear
• Hold
(Default: Clear)
2 PARAMETER SETTINGS
2.4 Application Settings
2
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