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(24)CH Forward/reverse action setting (address: 115H, 145H, 175H, 1A5H)
Select whether to use channels in the forward action or reverse action.
Select the forward action for the cooling control. Select the reverse action for the heating control.
For details on the forward/reverse action selection function, refer to the following.
Page 211, Section 8.3.18
(a) Setting range
• 0: Forward action
• 0: Reverse action
(b) Enabling the setting
Enable the setting contents by either of the following.
• Turning off and on Initial data setting request flag (RY9) while the operations of all channels are stopped
• Turning off and on During operation setting change instruction (RY10)
(c) Default value
The default values are set to Reverse action (1) in all channels.
(25)CH Loop disconnection detection judgment time (address: 116H, 146H,
176H, 1A6H)
Errors such as disconnection of resistors, malfunction of an external controller, and errors of the control system
due to troubles such as disconnection of the sensor can be detected by the loop disconnection detection function.
If temperature does not change by 2 () or more in the Loop disconnection detection judgment time, a loop
disconnection is detected.
For details on the loop disconnection detection function, refer to the following.
Page 212, Section 8.3.19
(a) Setting range
The setting range is 0 to 7200 (s).
Set a value that exceeds the time in which temperature changes by 2 ().
(b) When performing auto tuning
For this setting, the twice value of that of CH Integral time (I) setting (address: 103H, 133H, 163H, 193H) is
automatically set. (Page 320, Appendix 3 (8)) However, when this setting is set to 0 (s) at the start of the
auto tuning, Loop disconnection detection judgment time is not stored.
(c) Enabling the setting
Enable the setting contents by either of the following.
• Turning off and on Initial data setting request flag (RY9) while the operations of all channels are stopped
• Turning off and on During operation setting change instruction (RY10)
(d) Default value
The default values are set to 480 (s) in all channels.
334
Standard
Standard
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Troubleshooting
