Super Systems 20Q User Manual

Page 100

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: 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