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APPX
Appendix 3 Buffer Memory Areas
CH1 Input signal error detection upper limit set value
Set an upper limit value to detect an error for the input analog value.
For details on the input signal error detection function, refer to the following.
Page 38 Input Signal Error Detection Function
■Buffer memory address
The following shows the buffer memory address of this area.
•CH Input signal error detection upper limit set value
■Setting range
The setting range is from 0 to 250 (0 to 25.0%). Set it in a unit of 1 (0.1%).
For example, set 150 in the buffer memory area to set 15%.
In the channel where a value out of the range is set, an input signal error detection setting value range error (error code:
1C1H) occurs.
The input signal error detection upper limit value is calculated by using the input signal error detection upper limit set value as
follows. The input signal error detection upper limit value to be calculated varies depending on the input range used.
Input signal error detection upper limit value = Gain value of each range + (Gain value of each range - Offset value of each
range) (Input signal error detection upper limit set value/1000)
When 'CH1 Input signal error detection upper limit set value' (Un\G530) is set to 100 (10%)
Range used: 4 to 20mA
The input signal error detection upper limit value is calculated as follows:
Detection conditions vary depending on the setting of 'CH1 Input signal error detection setting' (Un\G528) as follows:
• When 'CH1 Input signal error detection setting' (Un\G528) is set to Upper and lower limit detection (1), the detection is
performed with both the input signal error detection upper limit value and the input signal error detection lower limit value.
• When 'CH1 Input signal error detection setting' (Un\G528) is set to Lower limit detection (2), the value set in this area is
ignored.
• When 'CH1 Input signal error detection setting' (Un\G528) is set to Upper limit detection (3), the detection is performed only
with the input signal error detection upper limit value.
• When 'CH1 Input signal error detection setting' (Un\G528) is set to Simple disconnection detection (4), the value set in this
area is ignored.
■Enabling the setting
Turn on and off 'Operating condition setting request' (Y9).
■Default value
The default value is 50 for all channels.
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16
530 730 930 1130 1330 1530 1730 1930 2130 2330 2530 2730 2930 3130 3330 3530
Input signal error detectionupper limit value = 20 + (20 - 4) ×
100
1000
= 21.6mA
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