Mitsubishi MELSEC iQ-F, User Manual

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156
APPX
Appendix 4 Buffer Memory Areas
CH1 Process alarm lower upper limit value
Set a lower upper limit value of the alert output function (Process 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.
■
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.
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 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.
■
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 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).
• When setting the input type to “Current” and “Voltage”, and when the digital clipping function, scaling
function, and shift function are used, the digital operation value to which digital clipping, scale conversion,
and shift-and-add are performed is the detection target for outputting an alert.
• When setting the input type to "resistance temperature detector" or "thermocouple", and the scaling function
and shift function are used, the digital operation value to which scale conversion, and shift-and-add are
performed is the target of outputting an alert (process alarm).
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH

Process alarm lower upper limit value 518 718 918 1118 1318 1518 1718 1918
CH  Process alarm lower upper limit value (in FX2N
allocation mode function)
1201 1202 1203 1204 1205 1206 1207 1208
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH

Process alarm lower lower limit value 520 720 920 1120 1320 1520 1720 1920
CH  Process alarm lower lower limit value (In FX2N allocation
mode function)
71 72 73 74 75 76 77 78