App-260
(17) Redundant system (tracking information)
The special register (SD1700 to SD1779) is valid only for redundant systems. All bits are set to "0" for stand-alone
systems.
(18) Redundant power supply module information
The special register (SD1780 to SD1789) is valid only for redundant power supply systems. All bits are set to "0"
for stand-alone power supply systems.
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
D9
Corres-
ponding
CPU
SD1700
Tracking
error
detection
count
Tracking
error
detection
count
• A value in this register is incremented by one upon tracking
error.
• The counter starts the routine: counts up from 0 to 32767,
then counts down to -32767 and then again counts up to 0.
S
(Error)
New QnPRH
SD1710
Waiting time
for online
program
change
(standby
system)
Waiting time
for online
program
change
(standby
system)
• This register stores the waiting time required for starting the
online program change in the standby system after
completion of that in the control system. The value is
specified in units of seconds.
• If online program change is not requested even after it is
completed in the control system, the CPU modules in both of
the system determine that it is a failure of an online program
change for redundancy.In this case, both system CPU
modules resume the consistency check for the systems that
have been on hold during the online program change.Also,
the control system is set to accept another request of online
program change for redundancy.
• When both systems are powered on, 90 seconds are set to
SD1710 as the default value.
• Set the value within the range 90 to 3600 seconds. When the
setting is 0 to 89 seconds, it is regarded as 90 seconds for
operation. If the setting is outside the allowed range, it is
regarded other than 0 to 3600 seconds for operation.
• The waiting time for a start of online program change to the
standby system CPU module is checked according to the
SD1710 setting during online change of multiple blocks and
online change of batch of files for redundancy.
S
(Initial)
/U
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
D9
Corres-
ponding
CPU
SD1780
Power supply
off detection
status
Power supply
off detection
status
• This register stores status of the redundant power supply
module (Q64RP) with input power off, in the following bit
pattern.
• When the main base unit is not the redundant power main
base unit (Q38RB), "0" is stored.
• When configuring multiple CPU, the status is stored to 1st
CPU module.
S
(Every END
processing)
New
Qn(H)
*2
QnPH
*2
QnPRH
QnU
*3
b0b7b8b15
SD1780
b9 b1
:
:
toto
toto
Input power OFF
detection status of
power supply 2
Each bit
0:Input power ON status/
No redundant power
supply module
1:Input power OFF status
Input power OFF
detection status of
power supply 1
1
1
Main base unit
1st extension base
7th extension base
Main base unit
1st extension base
7th extension base
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