KROHNE ALTOSONIC V EN - Manual (Page 78)

ALTOSONIC V
Operating Manual rev02 E 7.30850.34.00 Page 78 of 106
7 DATA ACQUISITION
Input data can be divided into:
•
Data input RS485 card
• Digital inputs MP103 card
•
Frequency inputs MP103 card
•
Analog inputs AD card
7.1 Data input RS485 card
The data measured by the five converters UFC-V is transferred to the UFP-V by using a half-duplex
Krohne communication protocol based on balanced data transmission (RS485).
The Krohne communication protocol requests the five converters for new measured data. The
incoming data is first checked on parity-errors, framing-errors, and overruns. The data essentially
contains the measured flow from 5 ultrasonic measuring paths, transit time, and error codes. The
converter sends data on every request the UFP makes (about every 35ms).
7.2 Digital inputs MP103 card
The MP103 card has 4 digital inputs.
The digital inputs are normally open (is 0)
The logic level is TTL compatible, maximum 12 VDC.
Channel
no. Function Action
0 Reset measured volume, proces-time and error messages Make input ‘1’ to reset
1 Reset error messages Make input ‘1’ to reset
2 Calibration start-signal (KROHNE Altometer use only) Make input ‘1’ to arm, make ‘0’ to enable
3 Calibration stop-signal (KROHNE Altometer use only) Make input ‘1’ to arm, make ‘0’ to enable
•
The digital input function can be disabled/enabled in the Initialisation files: HSET0300.UFP section
3
•
The individual channels can be disabled/enabled in the Initialisation files: CLNT0300.dat section 8
•
The signals can be checked on value in the service window IO.
• Monitoring is also possible by its calibration program (see Manual: ALTOSONIC V UFP
Calibration and Verification I/O)
1 2 3 4 5
RS 485 card
in UFP
Requests to UFC
converters 1..5
Reply of UFC converters 1..5
-
Flow percentage –125..+125%
- Transit time
- Status overrange
- Status path failure