Endress+Hauser Proline Prosonic Flow 93C Description Of Device Functions page 74

6 Block OUTPUTS
74
OUTPUTS → RELAY OUTPUT (1 to 2) → CONFIGURATION
ON-VALUE
!
(4701)
This function is not available unless LIMIT or FLOW DIRECTION was selected in the
ASSIGN RELAY function (4700).
Use this function to assign a value to the switch-on point (relay output pulls up). The
value can be equal to, greater than or less than the switch-off point. Positive or negative
values are permissible, depending on the measured variable in question (e.g. volume
flow).
User input:
5-digit floating-point number, [unit]
Factory setting:
0 [unit]
!
• The appropriate unit is taken from the UNIT VOLUME FLOW function (0402) .
• Only the switch-on point is available for flow direction output (no switch-off point). If
SWITCH-ON DELAY
!
(4702)
This function is not available unless LIMIT or FLOW DIRECTION was selected in the
ASSIGN RELAY function (4700).
Use this function to define a delay (0 to 100 seconds) for pull-up (i.e. signal changes from
0 to 1) of the relay output.
The delay starts when the limit value is reached. The relay output does switch when the
delay has timed out and the switch condition has been valid throughout the delay time.
User input:
Fixed point number 0.0 to 100.0 s
Factory setting:
0.0 s
OFF-VALUE
!
(4703)
This function is not available unless LIMIT was selected in the ASSIGN RELAY function
(4700).
Use this function to assign a value to the switch-off point (relay drops out). The value can
be equal to, greater than or less than the switch-on point. Positive or negative values are
permissible, depending on the measured variable in question (e.g. volume flow).
User input:
5-digit floating-point number, [unit]
Factory setting:
0 [unit]
!
• The appropriate unit is taken from the UNIT VOLUME FLOW function (0402) .
• If SYMMETRY is the setting selected in the MEASURING MODE function (4705) and
Device functions Proline Prosonic Flow 93C PROFIBUS DP/PA
Functional description
(only with PROFIBUS DP)
Note!
Note!
you enter a value not equal to the zero flow (e.g. 5), the difference between the zero
flow and the value entered corresponds to half the switchover hysteresis.
Note!
Note!
Note!
values with different signs are entered for the switch-on and switch-off points, an
"INPUT RANGE EXCEEDED" message is issued.
Endress+Hauser