Endress+Hauser Fieldgate FXA320, Operating Instructions Manual

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Fieldgate FXA320 6 Configuring the Fieldgate
Hauser 66
6.4.3 Digital input setup
Digital inputs can be assigned a tag, be enabled in the overview window and be set up as a switch
(default), pulse or frequency input. Pulse and frequency signal should be debounced to avoid
incorrect counts. The significance of the parameters is described in Table 6-8.
Digital input setup
Table 6-8: Digital input parameters
Pulse counter Inputs 1 and 3 may be configured as 32-bit pulse counters with a maximum value of 4294967296,
a maximum resolution of 0.001and a maximum counting frequency of 12 kHz.
The counter automatically rolls over to zero for upwards counting when the maximum permissible
value, 4 294 967 296 is reached. On down count, it resets to the start value when zero is reached.
When the counter overflows, a sensor error is sent by mail and/or SMS according to the "Alarm
Mail on Sensor Error" function and the "Device Status" is set to "ERROR". The counter is then reset
and starts again while the displayed value is reset to the specified start value. The "Device Status"
shows "ERROR" until the counter is re-initialised by pressing "Send". Multiple overruns are not
reported. This factory setting cannot be deactivated.
NOTE!
• The current count value is periodically saved every 10 minutes in the non-volatile memory. If the
system is restarted between two save periods, e.g. due to a power outage etc., totalized count
values can be lost in this period.
Frequency input Inputs 2 and 4 may be configured as frequency inputs with a frequency range 4.7 Hz (±1%) to
12.5 kHz (±4%). Input frequencies below 4.7 Hz are taken as 0 Hz.
Parameter Description
Tag Enter the Device Tag that is to appear in the overview page
Enabled Check this box if this input is to appear on the overview page
Impulse Counter Check this box if the input is to act as a pulse counter
Scaling Unit Enter the scaling unit code in plain text
Counts per Unit Enter the number of counts that correspond to 1 scaling unit
– Maximum resolution is 1/1000
Downcount Check this box if the counter is to count downwards
Hold Time Time at the start of the loop scan, in which any pulses are suppressed
– Only enter a hold time if switching signals from relays have to be de-bounced
Restart with Start
Value on Send Check this box then press Send to restart the counter
– The count starts at 0 or the start value, depending upon configuration
– The tick disappears after the counter has been restarted
Start Value Enter the value in scaling units from which the downcount is started
– Maximum value is 4294967296
Start Time Read-only time stamp for start of count (with Send pressed)
Send Press to register your changes in the Fieldgate.
Reset Press to discard any changes made since the previous send.