Endress+Hauser Mycom CLM 152 - System Integration Via PLC

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10.6 System Integration via PLC
The Mycom CLM 152 transmitter makes the measured values (OUT) available cyclically
using the PROFIBUS-PA protocol. Other PROFIBUS-PA parameters are made available
using the acyclical service.
Command Type Function
Module 1 OUT Read Current measured value of process variable
in mS/cm, kWcm or % and the corresponding
status.
 Status = 80
Hex
, devices OK
 Status = 0C
Hex
, warning or alarm active.
The information is transferred byte-by-byte in
5 bytes, with the last byte containing the
status information.
Module 2 OUT Read Current measured value of process variable in
°C and the corresponding status.
 Status = 80
Hex
, devices OK
 Status = 0C
Hex
, warning or alarm active.
The information is transferred byte-by-byte in
5 bytes, with the last byte containing the
status information.
Two so-called modules are available for the data exchange with the PLC and are
transferred together:
 Module 1: main measured value
 Module 2: temperature value measured
Data Format for Module 1 and Module 2
Byte Data Data Format
1 Measured value IEEE 754-floating point number
2 Measured value (mS/cm; kWcm or %)
3 Measured value
4 Measured value
5 Device status 80
Hex
= device OK
0C
Hex
= error (alarm active)
6 Measured value
7 Measured value IEEE 754-floating point number
8 Measured value (°C)
9 Measured value
10 Device status 80
Hex
= device OK
0C
Hex
= error (alarm active)
IEEE 754 Floating Point Number
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
VZ Exponent (E) Fraction (F)
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
Fraction (F)
2
-8
2
-9
2
-10
2
-11
2
-12
2
-13
2
-14
2
-15
2
-16
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
2
-23