215
CHAPTER 8 FUNCTIONS
8
8.
3 T
e
mperat
ure Cont
rol
M
ode
(3) When an alert occurs, or does not occur
If an alert for the loop disconnection detection occurs, CH
Alert occurrence flag (RX18 to RX1B) and CH
Loop disconnection detection (b13 of RWr4 to RWr7) turn on and Alarm code (03
AH) is stored in Latest
warning code (RWr2). (
The occurrence of loop disconnection alert may due to an error in the control loop. Therefore, even if AT is normally
completed, check the control loop and that the current Loop disconnection detection judgment time is correct.
(4) To clear the alert status
If any of the following conditions is met, CH
Alert occurrence flag (RX18 to RX1B) and CH
Loop
disconnection detection (b13 of RWr4 to RWr7) turn off.
• When the operating status is changed from run to stop
• A manipulated value (MV) becomes greater than the lower limit output limiter value and smaller than the
upper limit output limiter value.
• Disable (0) is set to During AT loop disconnection detection function enable/disable setting (address: 1E7H).
• 0 is set to CH
Loop disconnection detection judgment time (address: 116H, 146H, 176H, 1A6H).
• MAN (1) is set to CH
AUTO/MAN mode shift (address: 113H, 143H, 173H, 1A3H).
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