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(17)CH Process alarm lower lower limit value, CH Process alarm lower upper
limit value, CH Process alarm upper lower limit value, CH Process alarm
upper upper limit value
Set the range of digital operation value for each channel.
For details on Alert output function (process alarm), refer to the following:
• Alert Output Function (Process Alarm) ( Page 105, Section 8.10)
(a) Setting range
• Setting range is -32768 to 32767.
• The settings consist of the four items: process alarm upper upper limit value, process alarm upper lower
limit value, process alarm lower upper limit value, and process alarm lower lower limit value.
(b) Enabling the setting
Turn on and off Initial data setting request flag (RY9) to enable the setting.
(c) Default value
The default value is 0.
(d) Remote buffer memory address
The remote buffer memory addresses of this area are as follows:
● An error occurs in a channel with a set value out of the range above or a set value not meeting the following condition:
Process alarm upper upper limit value ≥ Process alarm upper lower limit value ≥ Process alarm lower upper limit value ≥
Process alarm lower lower limit value. An error results in the error code (06H or 16H) being stored in Latest error
code (RWr0), Error flag (RXA) turning on, and the ERR. LED lighting up, resulting in operation just before the error.
● By default, 0 is set and so change the set value.
● When the following functions are used, alert targets are digital operation values that reflect the operations of each
function. Set values considering operation results of each function.
• Digital clipping function
• Scaling function
• Shift function
• Difference conversion function
Remote buffer memory name
Main A/D converter module Extension A/D converter module
CH1 CH2 CH3 CH4 CH1 CH2 CH3 CH4
CH Process alarm lower lower limit value 010FH 0113H 0117H 011BH 020FH 0213H 0217H 021BH
CH Process alarm lower upper limit value 0110H 0114H 0118H 011CH 0210H 0214H 0218H 021CH
CH Process alarm upper lower limit value 0111H 0115H 0119H 011DH 0211H 0215H 0219H 021DH
CH Process alarm upper upper limit value 0112H 0116H 011AH 011EH 0212H 0216H 021AH 021EH
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