Ai 4-20 Ma + 6-Byte Mailbox; Table 18: Process Values For The Hart Module - WAGO 750-484 Manual

WAGO-I/O-SYSTEM 750
750-484 2 AI 4-20 mA HART Ex i
Status information, which can be evaluated in the event of a fault, is contained in
the two least significant bits (B0 and B1). If the measurement is above the
measuring range, Bit B0 is set = 1, and if the measurement is below the measuring
range or if a wire breaks, Bit B0 and B1 are set = 1.
The input voltage range for the measured values of 4 mA to 20 mA is scaled to
the numerical range from 0x0000 to 0x7FFD.

Table 18: Process Values for the HART Module

Input Current
4 mA ... 20 mA
<3
<4
4
6
8
10
12
14
16
18
20
>20
>22
*) Status bits: F = Cable Break, O = Overrun
4.1

2 AI 4-20 mA + 6-Byte Mailbox

In the "2AI + 6-byte mailbox" operating mode the HART module provides the
fieldbus coupler/controller with a 12-byte input and output process image via one
logical channel.
1 control byte (C0) and 1 status byte (S0) are used to monitor the data flow.
The data is mapped in the cyclic process image of the connected
coupler/controller. However, the HART commands can then be implemented by
the "WagoLibHart_0x.lib" PLC library. The data is tunneled to the application via
a mailbox and decoded by means of the library so that evaluation and processing
take place directly at the application level.
The IEC application can be implemented in the connected programmable fieldbus
controller (PFC) of the fieldbus node with the WAGO-I/O-PRO programming
tool or, if a fieldbus coupler is connected, in the superimposed controller.
Manual
V 1.2.0 HW-Version 04, SW-Version 03
Numeric Value
Binary
*)
Measured Value
'0000.0000.0000.00 11'
'0000.0000.0000.00 00'
'0000.0000.0000.00 00'
'0001.0000.0000.00 00'
'0010.0000.0000.00 00'
'0011.0000.0000.00 00'
'0100.0000.0000.00 00'
'0101.0000.0000.00 00'
'0110.0000.0000.00 00'
'0111.0000.0000.00 00'
'0111.1111.1111.11 00'
'0111.1111.1111.11 00'
'0111.1111.1111.11 01'
F O Hex. Dec.
0x0003
0x0000
0x0000
0x1000 4096
0x2000 8192
0x3000 12288
0x4000 16384
0x5000 20480
0x6000 24576
0x7000 28672
0x7FFC 32764
0x7FFC 32764
0x7FFD 32765
Process Image
Status LED
Byte Error
Hex. AI 1, 2
3 0x41 on
0 0x00 off
0 0x00 off
0x00 off
0x00 off
0x00 off
0x00 off
0x00 off
0x00 off
0x00 off
0x00 off
0x00 off
0x42 on
31