Super Systems 20Q - Manual (Page 100)

96
a) When “SF.Cn” [C.G07] is set to “Std.”:
a.1) An OVERRANGE is detected and
- the device is set for one control output only, the output
will be forced to 0 % (if reverse action is programmed)
or to 100% (if direct action is programmed).
- the device has two control outputs, the “Main” output is
forced to 0 % and “Secondary” output is forced to 100%.
a.2) An UNDERRANGE is detected and
- the device is set for one output only, the output is
forced to 100 % (if reverse action is programmed) or to
0 % (if direct action is programmed).
- the device has two control outputs, the “Main” output is
forced to 100 % and “Secondary” output is forced to 0
%
b) With “SF.Cn” [C.G07] set to “Ov.Un”, when an overrange or an
underrange condition is detected, the power output is forced
to the safety value “SF.UL” [C.G08].
c) When “SF.Cn” [C.G07] is set to “OvEr”
c.1) if an overrange condition is detected, the power output
is forced to the safety value “SF.UL” [C.G08]
c.2) if an underrange condition is detected the instrument will
operate as described at point a.2).
d) When “SF.Cn” [C.G07] is set to “Undr”
d.1) if an underrange condition is detected, the power output
is forced to the safety value “SF.UL” [C.G08]
d.2) if an overrange condition is detected the instrument will
operate as described at point a.1).
NOTE NOTE NOTE NOTE NOTE: IN ALL CASES ABOVE DESCRIBED THE OUTPUTS WILL
BE FURTHER INFLUENCED BY “OUTPUT CONDITIONING”
When servomotor open loop is configured, the “Condition for
output safety value” ("SF.Cn [C.G07]) acts as described below:
1) When “SF.Cn” [C.G07] is set to “Cnd.A” and an overrange or
an underrange condition is detected, the servomotor is driven
to its high limit position (OUT 3 “ ” will be maintained closed).
2) With “SF.Cn” [C.G07] is set to “Cnd.b” and an overrange or an
underrange condition is detected, the servomotor is driven to
its low limit position (OUT 4 “ ” will be maintained closed).
3) When “SF.Cn” [C.G07] is set to “Cnd.C” the out-of-range
condition acts on the control output as the complement of
effect described at point a).
mkc-ssi.pmd 06/07/2004, 12.20 96