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CHAPTER 8 FUNCTION
8
8.10 Digital Value Range Check Function
8.10 Digital Value Range Check Function
An error is output when the digital value is out of the digital input range for the output range.
(1) Notification of a check code
When the digital value is greater than the upper limit of the setting range or smaller than the lower limit of the
setting range, it is notified with the following operation.
• The check code is stored in CH Set value check code (RWr2 to RWr5).
For details on check codes, refer to the following.
Page 158, Appendix 2 (3)
• Out-of-range digital value (060) is stored in Latest warning code (RWr1).
• Warning flag (RX7) turns ON.
• The ALM LED flashes.
For the setting range for the digital value, refer to the following.
*1 The setting range and the actual range of when the scaling function is enabled depend on the settings in the scaling
upper limit value and the scaling lower limit value.
(2) Operation of when an error is notified with a check code
When the digital value is greater than the upper limit of the setting range or smaller than the lower limit of the
setting range, analog output is as follows:
• When the digital value is greater than the upper limit of the setting range, the analog value is output with the
upper limit of the setting range.
• When the digital value is smaller than the lower limit of the setting range, the analog value is output with the
lower limit of the setting range.
The analog output value returns to the normal value when the digital value falls within the setting range. However,
the indicated notification remains as follows:
• Once a check code is stored, it is not reset automatically.
• Warning flag (RX7) remains ON.
• The ALM LED remains flashing.
Output range setting
When the scaling function is disabled
When the scaling function
is enabled
*1
Setting range (Actual range)
Digital value when a value out
of the setting range is written
Setting range
4 to 20mA
-288 to 12287
(Actual range: 0 to 12000)
12288 or more: 12287
-289 or less: -288
-32768 to 32767
(Maximum actual range: -32000
to 32000)
0 to 20mA
1 to 5V
0 to 5V
-10 to 10V
-16384 to 16383
(Actual range: -16000 to 16000)
16384 or more: 16383
-16385 or less: -16384
User range setting 1
(-10 to 10V)
-12288 to 12287
(Actual range: -12000 to 12000)
12288 or more: 12287
-12289 or less: -12288
User range setting 2
(0 to 20mA)
-288 to 12287
(Actual range: 0 to 12000)
12288 or more: 12287
-289 or less: -288