Exchanging Data With The Cpu Unit - Omron SYSMAC CJ1W-AD04U Operation Manual

Exchanging Data with the CPU Unit

4-1 Exchanging Data with the CPU Unit
Outline of Data Exchange
Operating Data
Unit Settings
CJ-series CPU Unit
10 words
100 words
24
Data is exchanged between the CPU Unit and the CJ1W-AD04U and CJ1W-
AD04U-SL Universal Input Units via the Special I/O Unit Area (for data used
to operate the Unit) and the Special I/O Unit words in the DM Area (for data
used for settings).
These CIO Area words contain the process values, alarm outputs, and flags
such as the Sensor Error Flags. The words in the CPU Unit's Special I/O Unit
Area are allocated by unit number.
These DM Area words contain various Unit settings. The words allocated to
the Unit in the DM Area are allocated by unit number.
The Unit settings are divided into the following 5 areas.
• Unit values read command
• Address of data range error
• Continuously refreshed area
• Initial settings area
• Expansion Setting Area settings
Special I/O Unit Area
n
n+1
to
n+9
n = 2000 + (unit No. × 10)
DM Area
m
Unit values read command
m+1
Address of data range error
Continuously Refreshed Area
Alarm settings
m+2
to
to
m+17 Zero adjustment value
Initial settings area
Temperature unit setting
m+18
to
to
Scaling
m+38
Expansion Setting Area
settings
Expansion Setting Area
m+39
Enable Bit
Expansion Setting Area
m+40
address
m = D20000 + (unit No. × 100)
Expansion Setting Area
Address specified in m+40
CJ1W-AD04U/AD04U-SL
Universal Input Unit
Continuously Refreshed Area
(Process values, alarm outputs,
Sensor Error Flags, etc.)
I/O refresh
Power ON or Unit restart
Unit values read command
Address of data range error
I/O refresh
PLC turned ON or
Unit restarted.
Continuously Refreshed
Area Alarm settings,
zero/span adjustment
Area Refreshed at Restart
Initial values for input types,
Power ON or Unit restart
Expansion Setting Area
I/O refresh
Data for Operation
Process Value Alarm
I/O refresh
Section 4-1
Operating Data
Refer to P. 31
Unit Settings
values, etc.
scaling, etc.
settings
Refer to P. 33