9.4.2.4 TC-low – Lower tight-closing limit value
The lower value of the tight-closing limit can be set with this parameter. If the setpoint position of the
positioner is below the adjusted limit, the valve is moved to the lower end position with maximum
positioning force.
Value range Description
0.0…45.0% Factory setting:2.0%
Tab. 18
9.4.2.5 TC-up – Upper tight-closing limit value
The upper value of the tight-closing limit can be set with this parameter. If the setpoint position of the
positioner is above the adjusted limit, the valve is moved to the upper end position with maximum
positioning force.
Value range Description
55.0…100.0% Factory setting:98.0%
Tab. 19
9.4.2.6 SL-Mod − Stroke-limitation mode
You can use this parameter to restrict the work area. The restriction is independent of the character of
the setpoint value characteristic curve (linear, equal percentage, user-defined). The setpoint position
of the setpoint value characteristic curve corresponds to the setpoint position of the stroke limitation.
Value range Description
inactiv Stroke-limitation mode deactivated (factory set-
ting)
bothact Stroke-limitation mode for lower and upper
stroke-limitation value active
up_act Stroke-limitation mode for upper stroke limita-
tion value active
low_act Stroke limitation mode for lower stroke limitation
value active
Tab. 20
Stroke limitation and tight closing cannot be active simultaneously in one end position. If it is not pos-
sible to change the mode, a message appears on the display.
Commissioning
35Festo — CMSX-...-C-U-F1-... — 2019-09d
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