39
Expansion Setting Area
Section 4-3
4-2-9
Cold Junction Sensor Error Detection
If one of the Unit’s built-in cold junction sensors fails, the error is output to the
corresponding bit in CIO word n+9, as shown in the following table.
4-2-10 Other Settings
Unit Values Read Command
The default values in the Universal Input Unit can be read to the CPU Unit
when the power is turned ON or the Input Unit is restarted.
Address of Data Range Error
If an invalid setting is detected in the DM Area’s “continuously refreshed area”
or “initial settings area,” the ERC indicator on the Unit's front panel will light.
The address of the last 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, i.e., the address is m + offset.
Refer to
5-2 Errors Detected by the Universal Input Unit
for details.
4-3
Expansion Setting Area
The Expansion Settings Area can be set to transfer an alarm output directly to
an output device such as an Output Unit (without going through the ladder
program) when the process value exceeds the high or low limit alarm value.
Enabling the Expansion Setting Area
When using the Expansion Setting Area, make the following settings in m+39
and m+40.
Note
1.
When specifying the Expansion Setting Area, be sure that it does not over-
lap with other areas that are being used. If areas overlap, the words that
are allocated may be overwritten, resulting in unexpected operation.
2.
When specifying the first word in the Expansion Setting Area, be sure that
the Expansion Setting Area does not exceed the end of the data area.
CIO word
Bit
Contents
CIO n + 9
08
Input 1 cold junction sensor error
0: Normal
1: Error
09
Input 2 cold junction sensor error
10
Input 3 cold junction sensor error
11
Input 4 cold junction sensor error
DM word
Function
Set value
m + 0
Unit values read command
• 12345 (3039 hex):
The Input Unit’s initial values are read
from the Input Unit to CPU Unit words
m+2 to m+40.
(When the transfer is completed, this
word is reset to 0000 hex.)
• 0000 hex or other value besides
12345 (3039 hex):
The data in the allocated words of DM
Area is transferred from the CPU Unit
to the Universal Input Unit
m + 39
Expansion Setting Area Enable
0 hex: Not used.
1 hex: Used.
m + 40
Expansion Setting Area address
0 to 6143 (0000 to 17FF hex)
Summary of Contents for SYSMAC CJ1W-AD04U
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