Trane TR1 6022 - Page 101

101
Calculation of Resulting Reference
The calculation made below gives the resulting reference when para-
meter 210, Reference Type, is programmed for Sum and Relative,
respectively. In Open Loop, parameters 418 and 419, Setpoints 1 and
2, should be set to 0. If they are not set to 0, parameter 417, Feedback
Function, will affect the reference.
External reference is the sum of references from terminals 53, 54,
60 and serial communication. The sum of these can never exceed
parameter 205, Maximum Reference.
External reference can be calculated as follows:
+ External ref. + Par. 204 Min. ref. + Feedback setpoint
External reference x Par. 211-214 Preset ref.
Parameter 210, Reference Type, is programmed = Relative
+ Par. 204 Min. ref. + Feedback setpoint
Res. ref. =
100
Parameter 210, Reference Type, is programmed = Sum
Res. ref. =
(Par. 205 Max. ref. - Par. 204 Min. ref.) x Par. 211-214 Preset ref.
100
Ext. ref. =
Par. 310 Term. 53 Max. scaling - Par. 309 Term. 53 Min.scaling
(Par. 205 Max. ref. - Par. 204 Min. ref.) x Ana. signal Te rm . 53 [V]
Par. 313 Term. 54 Max. scaling - Par. 312 Term. 54 Min. scaling
(Par. 205 Max. ref. - Par. 204 Min. ref.) x Ana. signal Te rm . 54 [V]
+
Par. 316 Term. 60 Max. scaling - Par. 315 Term. 60 Min.
scaling
(Par. 205 Max. ref. - Par. 204 Min. ref.) x Par. 314 Term. 60 [mA]
+
serial com. reference x (Par. 205 Max. ref. - Par. 204 Min. ref.)
16384 (4000 Hex)
+