Function group
COMMUNICATION
In this function group, the interfaces provided by the Promag 33 can be appropriately configured
and/or activated (Rackbus RS 485, HART protocol):
• The Promag 33 electronics are fitted either with the communications module “HART” or “RS 485”
according to the order specifications.
• Further information on the HART protocol is found on → page 33, 40
• Further information on the Rackbus RS 485 is found on → page 30, 42
PROTOCOL
For communication via a serial interface, various data transmission protocols
are available which can be activated or switched off in this function.
Note!
For instruments with no local operation (blind version), the appropriate
protocol is always switched on.
6
With “HART” communications module
OFF
– HART
With “RS 485” communications module
OFF
– RACKBUS RS 485
BUS ADDRESS
In this function, the bus address can be set for carrying out data transfer via
the HART protocol or RS 485.
Note!
The following applies for HART:
– The 4...20 mA analogue output is only active with the address “0”
(→ ‘point-to-point network’).
– If the address is not “0”, then the current output is set to 4 mA
(→ ‘multidrop network’).
6
2-digit number:
0
...15 (HART),
0
...63 (RS 485)
ASSIGN
AUX. INPUT
In this function, various functions can be assigned to the auxiliary input.
This is only possible if:
• the transmitter is fitted with an “RS 485” communications module,
• the function “SYSTEM CONFIG.” is set to “AUX. INPUT/.....” (see page 71).
The functions of the auxiliary input are started or activated by applying an
external voltage. Two types of activating are to be disginguished:
• Pulsed mode (enter start pulse width → see page 71)
• Level mode
Note!
• Please refer to the table on page 70. This gives a summary of
all
possible
functions of the auxiliary input.
• If the auxiliary input is not available or an instrument with the HART
communications module is used, then this function is blanked out.
6
With “Pulsed mode”
RESET TOTALIZER
BATCHING *
With “Level mode”
DUAL RANGE MODE *
POS. ZERO RETURN
* This parameter is only shown on the display if the
appropriate function has already been activated.
Note!
Note!
Note!
Promag 33 6 Description of Functions
Endress+Hauser 69
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