Cooper Instruments & Systems DFI 1650 Multi-Channel Digital Force Indicator User Manual
Page 28
CF 66
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Rev. C 2/05
If no Relay Output channels are installed, there are four Limit menus, which control the operation of the open-
collector Limit Outputs on the System connector.
Detailed instructions on operating the instrument in the SETUP Menu mode can be found in “SETUP Menu mode”.
A diagram of all menus is located in “Setup Menu Reference”.
9.3.2 LIMIT.ENABLE Menu Item
This enables or disables the operation of this limit. The two options for this menu item are “ON” and “OFF”.
9.3.3 LIMIT.SETPOINT Menu Item
This is the numeric value in engineering units for the signal level that activates the limit.
9.3.4 LIMIT.RETURN PNT Menu Item
This is the numeric value at which the limit deactivates. In general, this number should differ from the set point
values by at least 1% of full scale.
Carefully consider what value should be entered for the RETURN POINT. If the signal is expected to approach the
SET POINT from a lower value, the RETURN POINT value should be less (algebraically) than the SET POINT. If
the signal is expected to approach the SET POINT from a higher level, the RETURN POINT should be higher
(algebraically) than the SET POINT.
9.3.5 LIMIT.ENERGIZE Menu Item
This specifies when to activate the limit relative to the set point and return point.
The options for this menu item are:
• “SIGNAL > SETPOINT” means the limit will activate when the signal is higher than the set point.
• “SIGNAL< SETPOINT” means the limit will activate when the signal is lower than the set point.
• “SIGNAL INSIDE” means the limit will activate when the signal is in between the set point and the return point.
• “SIGNAL OUTSIDE” means the limit will activate when the signal is not in between the set point and the return
point.
The figures below further illustrate the differences between these settings.
Figure 9-1: Limit Operation when LIMIT.ENERGIZE = SIGNAL > SETPOINT