FMC Technologies Proline Promass 83 E - Function Description

Issue/Rev. 0.2 (12/12) MN0M023 • Page 93
Device Functions Proline Promass 83 7 Block OUTPUTS
ASSIGN STATUS
(continued)
Factory setting:
FAULT MESSAGE
! Note!
• The behavior of the status output is a normally closed behavior, in other words the
output is closed (transistor conductive) when normal, error-free measuring is in
progress.
– “normal, error-free” operation: Flow direction = forwards; limit values = not
exceeded; no empty or partially filled measuring tube (EPD/OED); no fault or notice
message present.
– Switching response like relay output, page 109
• If you select OFF, the only function shown in the CONFIGURATION function group is
this function, in other words ASSIGN STATUS (4241).
• Switching response like relay output, see page 109.
ON-VALUE
(4242)
! Note!
This function is not available unless STATUS was selected in the OPERATION MODE
function (4200) and LIMIT VALUE or FLOW DIRECTION was selected in the ASSIGN
STATUS function (4241).
Use this function to assign a value to the switch-on point (activation of the status output).
The value can be higher or lower than the switch-off point. Positive or negative values
are permissible, depending on the measured variable in question (e.g. mass flow, totalizer
reading).
User input:
5-digit floating-point number [unit]
Factory setting:
0 [kg/h] or 2 [kg/l] or 200 [°C]
! Note!
• If SYMMETRY is selected in the function MEASURING MODE (4246) and values with
different signs are entered for the switch-on and switch-off points, the notice message
“INPUT RANGE EXCEEDED” appears.
• Only the switch-on point is available for flow direction output (no switch-off point). If
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.
SWITCH-ON DELAY
(4243)
! Note!
This function is not available unless STATUS was selected in the OPERATION MODE
function (4200) and LIMIT VALUE or FLOW DIRECTION was selected in the ASSIGN
STATUS function (4241).
Use this function to define a delay (0...100 seconds) for the switch-on (i.e. signal changes
from “not conductive” to “conductive”) of the status output. The delay starts when the
limit value is reached. The status output does switch when the delay has timed out and
the switch on condition has been valid over the delay time.
User input:
fixed-point number: 0.0...100.0 s
Factory setting:
0.0 s
Function description
OUTPUTS o PULSE/FREQUENCY OUTPUT (1...2) o CONFIGURATION (STATUS)