Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 161

CH1 Process alarm lower lower limit value
Set a lower lower limit value of the alert output function (Process alarm).
For details on the alert output function, refer to the following.
Page 46 Alert output function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Process alarm lower lower limit value
CH Process alarm lower lower limit value (In
FX3 allocation mode function)
■Setting range
The possible setting range is from -32768 to +32767.
■Enabling the setting
Turn offonoff 'Operating condition setting request' (Un\G70, b9) to enable the setting.
■Default value
The default value is 0 for all channels.
• When using the process alarm, configure the 4-step settings for the process alarm upper upper limit value,
upper lower limit value, lower upper limit value, and lower lower limit value.
• A channel where the set values do not satisfy the condition "Upper upper limit value  Upper lower limit
value  Lower upper limit value  Lower lower limit value" causes a process alarm upper lower limit value
setting range error (error code: 1BH).
• Since the default value is 0, change the setting value.
• When the scaling function, shift function, digital clipping function, or difference conversion function is used,
alarm targets are digital operation values to which the operation of each function is reflected. Be sure to
consider operation results of each function to set values.
CH1 Rate alarm alert detection cycle setting
Set the cycle to check the change rate of digital output values.
The value of the cycle to detect a rate alarm alert is the product of the value in 'CH1 Rate alarm alert detection cycle setting'
(Un\G522) and the conversion cycle.
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Rate alarm alert detection cycle setting
CH Rate alarm alert detection cycle setting (In
FX3 allocation mode function)
■Setting range
The possible setting range is from 1 to 32000 (times).
■Enabling the setting
Turn offonoff 'Operating condition setting request' (Un\G70, b9) to enable the setting.
■Default value
The default value is 0 for all channels.
CH1 CH2
520 720
71 72
CH1 CH2
522 722
1221 1222
CH3 CH4
920 1120
73 74
CH3 CH4
922 1122
1223 1224
Appendix 4 Buffer Memory Areas
A
APPX
159