Mitsubishi MELSEC iQ-F, User Manual

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158
APPX
Appendix 4 Buffer Memory Areas
CH1 Rate alarm lower limit value
Set a lower limit value of the change rate of digital operation values to detect a rate alarm.
For details on the alert output function, refer to the following.

Page 36 Alert Output Function
■
Buffer memory address
The following shows the buffer memory address of this area.
■
Setting range
The possible setting range is from -32768 to +32767.
Unit of the setting value differs depending on the setting of ‘Rate alarm change rate selection’ (Un\G299).
■ Enabling the setting
Turn off
→
on
→
off 'Operating condition setting request' (Un\G70, b9) to enable the setting.
■
Default value
The default value is set to 0.
• When using the rate alarm, configure the 2-step settings for the rate alarm upper limit value and lower limit
value.
• A channel where the set values satisfy the condition "Rate alarm lower limit value
≥
Rate alarm upper limit
value" causes a rate alarm upper/lower limit setting value inversion error (error code: 1BA  H).
• Since the default value is 0, change the setting value.
CH1 Input signal error detection setting
Set a condition for detecting an input signal error.
For details on the input signal error detection function, refer to the following.
 Page 46 Input Signal Error Detection Function
If a value other than the above is set, an input signal error detection setting range error (error code: 1C0

H) occurs.
When the 'CH1 Input type/range setting' (Un\G598) is set to resistance temperature detector or thermocouple, the setting of
'CH1 Input signal error detection setting' (Un\G528) is ignored.
■ Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH

Rate alarm lower limit value 526 726 926 1126 1326 1526 1726 1926
CH  Rate alarm lower limit value (In FX2N allocation mode
function)
1231 1232 1233 1234 1235 1236 1237 1238
Rate alarm change rate selection (Un\G299) Unit
Rate specification (0) 0.1%
Digital output value specification (1) digit
Setting value Setting content
0 Disable
1 Upper and lower limit detection
2 Lower limit detection
3 Upper limit detection
4 Simple disconnection detection
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH  Input signal error detection setting 528 728 928 1128 1328 1528 1728 1928
CH  Input signal error detection setting (In FX2N allocation
mode function)
1151 1152 1153 1154 1155 1156 1157 1158