Sp.fu - Samson Trovis 6493 Mounting And Operating Instructions

Functions of the compact controller

3.3.2 SP.FU

This function enables you to define a set point ramp and change between the different reference
variables via the binary input.
W
WINT
W
2
W
1
WINT
Upper range value
Lower range value
TSRW Transit time of set
point ramp
Fig. 5 · Set point ramp
choose between two starting values (actual value or parameter WIRA). The set point ramp can
also be active upon each change of the reference variable.
TSRW = t x |
1
Choose between:
Set point ramp
oFF RAMP
g
F01 RAMP
g
F02 RAMP
g
F03 RAMP
g
Parameters to be set
TSRW Transit time of set point ramp in seconds
WIRA Starting value of reference variable as absolute value
28
EB 6493-1 EN
t
1
TSRW
W Old value of ref. variable
1
W New value of ref. variable
2
t
Actual transit time of set
1
point ramp
WINT – WINT|
| W2 – W1|
Set point ramp deactivated
Set point ramp starts with BI1 and actual value
Set point ramp starts with BI1 and WIRA
Set point ramp activated, no starting conditions
Set point ramp means that the
reference variable changes at
a constant rate. When the ref-
erence variable is changed,
the compact controller follows
this change with a certain de-
lay to prevent oscillations. The
transit time of the set point
ramp is determined by the pa-
rameter TSRW. TSRW refers
to the entire defined measur-
ing range, e.g.
t WINT. When the reference
variable changes from a value
W to a new value W
1
actual transit time of the set
point ramp is the time t
lustrated in Fig. 5.
You may start the set point
ramp via the binary input, and
WINT and
, the
2
, as il-
1