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Exchanging Data with the CPU Unit
Section 4-1
Contents of the Operating Data and Unit Settings Areas
The following functions are assigned to data in the CPU Unit’s Special I/O Unit
Area and Special I/O Unit words in the DM Area.
Note
If an out-of-range setting is detected in either the continuously refreshed area
or initial settings area, the ERC indicator on the Unit's front panel will light.
The address of the first word containing an invalid setting is stored in the
“address of data range error” word in four digits hexadecimal, as the offset
from word m.
If the first out-of-range setting is in the Expansion Setting Area, the “address
of data range error” offset will be +100 or higher (+100 if the first word in the
Expansion Setting Area is invalid).
When the continuously refreshed area is changed, the ERC indicator will light
and the address will be indicated in the “address of data range error.” The next
time that the power is turned ON or the Unit is restarted, the ERC indicator will
light again and the corresponding out-of-range error address in the initial set-
tings area will be displayed.
Data area
Function
Timing of data
transfer
Operating Data
Contains operating data, including
the process values, alarm outputs,
and flags such as the Sensor Error
Flags. The words are in the CPU
Unit's Special I/O Unit Area (part of
the CIO Area).
Cyclic (during I/O
refreshing)
User Settings
The following settings are allocated in
the Special I/O Unit words in the DM
Area.
---
Unit values read
command
Reads the Universal Input Unit initial
data to the CPU Unit.
When power is
turned ON or Unit is
restarted
Address of data
range error
Contains the address where out-of-
range data was detected. (See note.)
Continuously
refreshed area
Contains settings such as the alarm
hysteresis, alarm ON delay, and zero/
span adjustment settings.
Cyclic (during I/O
refreshing), when
power is turned ON,
or Unit is restarted.
Initial settings area
Sets initial Unit settings such as the
input type and scaling settings.
When power is
turned ON or Unit is
restarted
Expansion Setting
Area settings
Makes Expansion Setting Area set-
tings.
Summary of Contents for SYSMAC CJ1W-AD04U
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