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1. SPECIFICATIONS OF MOTION SYSTEM COMPONENTS
1
−
15
(b) SCPU functions
Refer to the A2SHCPU user's manual for details of the SCPU functions of
A171SHCPUN/A172SHCPUN and A3UCPU user’s manual for details of
the SCPU functions of A173UHCPU.
Table 1.3 Table of SCPU Functions
Function Description
Constant scan
!
Sets a constant time for one scan of a sequence program which is independent of the sequence
program scan.
!
Set the constant scan time between 10 ms and 2000 ms.
Latch (hold on
power interruption)
!
The contents of devices set as latch devices are retained when a reset or a power interruption
over 20 ms occurs if the power is turned off.
!
Devices L, B, T, C, D, W can be set as latch devices.
Remote
RUN/STOP
!
Conducts remote RUN/STOP sequence control from external inputs or peripheral devices when
the RUN/STOP switch is set to RUN.
PAUSE
!
Stops the operation and holds the output (Y) ON/OFF status.
!
The PAUSE status can be set by two method:
!
With the remote PAUSE contacts
!
From a peripheral device
Status latch
!
The contents of all devices are written to the CPU module status latch area when the status
latch conditions are met.
!
The contents of the devices stored in the status latch area can be monitored from a peripheral
device.
Sampling trace
!
The operating status of the designated device is sampled at the set interval, and the results are
stored in the CPU module sampling trace area.
!
Data stored in the sampling trace area can be monitored from a peripheral device.
Off-line switch
!
Separates the devices (Y, M, L, S, F, B) used by the OUT instruction from the sequence
program operations.
Error indicator
order or priority
!
Sets order in which the indicators light and go out when an error occurs.
Clock
!
Executes the CPU module internal clock operations.
!
Clock data is: year, month, day, hour, minute, second, day of week.
!
The clock data can be read to D9025 to D9028.