Mitsubishi Electric NZ2GF2B-60TCTT4 User Manual page 172

(2) Deviation alert
With the deviation alert, when the deviation (E) between the temperature process value (PV) and the set value
(SV) meets a particular condition, the system is put in an alert status.
The set value (SV) to be referred is either "set value (SV) monitor" or "set value (SV) setting" depending on the
alert mode. When a setting change rate limiter is specified, "set value (SV) monitor" follows the set value (SV) by
the specified change rate.
For details on the setting change rate limiter setting, refer to the following.
• Page 324, Appendix 3 (12)
The following table describes the use of each set value (SV) of when a setting change rate limiter is specified,
and can be referred to use a deviation alert.
Reference area of the set value
CH Set value (SV) monitor (RWrC
to RWrF)
CH Set value (SV) setting (address:
101H, 131H, 161H, 191H)
(a) Set value (SV) and the setting change rate limiter setting
The following figures show the relationships of two types of set value (SV) depending on whether the setting
change rate limiter is specified or not.
• When the setting change rate limiter is not specified: The two types of set value (SV) are the same value.
Temperature process value (PV)
Set value (SV) 2
Set value (SV) 1
• When the setting change rate limiter is specified: The value in CH Set value (SV) monitor (RWrC to
RWrF) follows the set value (SV) of after the setting is reflected.
Temperature process value (PV)
Set value (SV) 2
Change
Set value (SV) 1
170
(SV)
This value is used when the temperature process value (PV) needs to follow the changing set value
(SV) within a consistent deviation (E). If the temperature process value (PV) does not follow the set
value (SV) and strays out of the set deviation range, an alert occurs.
This value is used for the alert occurrence to be determined only by the deviation (E) from the set
value (SV). In this case, how well the temperature process value (PV) is following the changing set
value (SV) does not matter. Even if the value in CH Set value (SV) monitor (RWrC to RWrF) is
changing, an alert can occur depending on the deviation (E) from the set value (SV).
Change
0
0
Use (when the set value (SV) is changed)
CH□ Set value (SV) setting
(address: 101H, 131H, 161H, 191H) and
CH□ Set value (SV) monitor (RWrC to RWrF)
Time
CH□ Set value (SV) setting
(address: 101H, 131H, 161H, 191H)
CH□ Set value (SV) monitor
(RWrC to RWrF)
CH□ Setting change rate limiter/
Setting change rate limiter (temperature rise)
(address: 108H, 138H, 168H, 198H)
Time
CH□ Setting change rate limiter unit time setting
(address: 109H, 139H, 169H, 199H)