Burkert Type 8611 - Manual (Page 85)

85
FunctionsoftheConfigurationLevel
display description
LIMT Selection for the binary output with the function as limit switch.
REL Limit states are monitored relatively to the set-point value (SETP) using a super-
imposed switching hysteresis between the limit values ( SETP+HYLO) and SETP-
HYLO). If the set-point value (SETP) is changed, the monitoring limits are adapted
automatically.
See Figure 64
HYHI: Permissible exceeding of upper set-point value
HYLO: Permissible dropping below lower set-point value
Value range:
HYHI, HYLO >= 0
Measuring unit: absolute, like defined in UNIT
ABS Limit values are monitored absolutely to fixed limit values (PVHI) and (PVLO).
Depending on the selected control variable and measuring unit following variables can
be selected:
FLOW: Monitoring of flow
PRES: Monitoring of pressure
TEMP: Monitoring of temperature
LEVL: Monitoring of level
VAL: Monitoring of conductivity, pH-value, concentration or process values
without indication of units ( UNIT = NU)
PVHI: Upper switching threshold referred to analog process variable
PVLO: Lower switching threshold referred to analog process variable
Value range
PVLO, PVHI: PVHI > PVLO
Measuring unit: absolute, like defined in UNIT
POS Monitoring takes place relatively to the valve position ( POS).
POSL: Lower switching threshold referred to valve position (%, mA or V)
POSH: Upper switching threshold referred to valve position (%, mA or V)
Value range
POSL/POSH: POSH > POSL
DLY Time in sec for that the deviation must constantly be present.
INV Specify whether the limit switch is to be active inside or outside the monitoring
window.
YES: Binary output is active if the limit values are inside the monitoring window.
NO: Binary output is active if the limit values are outside the monitoring window.
HIGH Binary output active at voltage of 24 V.
LOW Binary output active at voltage of 0 V.
LED
YES: LED is on, if binary output is active
NO: LED is off, if binary output is active
TEXT YES: Indication of error message (ERR), if binary output is active
NO: No indication of error message (ERR), if binary output is active
Table 32: Display B_O1, LIMT
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Type 8611