Mitsubishi L Series User Manual page 186

(22)CH Input signal error detection setting value (Un\G142 to Un\G145)
Set the setting value to detect an input analog value error for each channel.
For details on the input signal error detection function and input signal error detection extension function, refer to
the following.
• Input signal error detection function (
• Input signal error detection extension function (
(a) Setting procedure
• Setting range is 0 to 250 (0 to 25.0%). Set in increments of 1 (0.1%).
• The input signal error detection upper and lower limit values are calculated as follows based on the input
signal error detection setting value. The calculating input signal error detection upper and lower limit
values will be different depending on the input range to be used.
[Input signal error detection upper limit value]
=
[Input signal error detection lower limit value]
=
When the input signal error detection setting value is set to 100 (10%)
Ex.
Range to be used: 4 to 20mA
The upper and lower limit values of input signal error detection are as follows:
• Conditions vary as follows depending on the setting in Input signal error detection extension setting
(Un\G27).
Input signal error detection extension setting
(b) Enabling the setting
Turn OFF → ON → OFF Operating condition setting request (Y9) to enable the setting.
(c) Default value
All channels are set to 5% (50).
184
Gain value of
Gain value of
+
each range
each range
Gain value of
Lower limit value
-
each range
of each range
Input signal error
detection upper limit value
Input signal error
detection lower limit value
(Un\G27)
Lower upper limit detection (1)
Lower limit detection (2)
Upper limit detection (3)
Disconnection detection (4)
Page 69, Section 8.7)
Page 74, Section 8.8)
Offset value of
-
each range
Offset value of
-
each range
100
= 20 + (20 - 4)
1000
100
= -4 - (20 - 4)
1000
At the input signal error detection upper limit value or the
input signal error detection lower limit value
At the input signal error detection lower limit value
At the input signal error detection upper limit value
• In 2mA or less, or 0.5V or less
• The setting for CH
value (Un\G142 to Un\G145) is ignored.
• Input range other than 4 to 20mA (extended mode) or 1 to
5V (extended mode) cannot be used.
Input signal error
detection setting value
1000
Input signal error
detection setting value
1000
= 21.6mA
= -2.4mA
Detection condition
Input signal error detection setting