Hart Variables; Parameterisation - Festo CPX-4AE-4AA-H Description/Commissioning

Commissioning
Variant I/O
4AA-H Input
Output
1) IW CH0 = actual value of channel 0 (input), SW CH1 = setpoint value of channel 1 (output), etc.; HV= HART variable
Tab. 14 Process image for variants with HART variables
9.3

HART variables

The process image can be extended with a total of 4 HART variables
è Tab. 14 Process image for variants with HART variables.
– Quantity per HART variable: 4 bytes
– Data format: 16-bit value
Depending on the higher-order control system, low byte and high byte may be organised differ-
ently.
– If an invalid value has been determined, 0xFFFF is transmitted.
– Determination of the HART variables to be transferred during parameterisation
è 9.4 Parameterisation.
9.4

Parameterisation

The terminal CPX and the module described here can be parameterised with the operator unit (CPX-
MMI), the Festo Maintenance Tool (CPX-FMT) software or the higher-level system.
Festo — CPX-4AE-4AA-H — 2019-04a
Content of bytes
1)
22 20 18 16 14
23 21 19 17 15
–
HV4
– –
12 10 8 6 4
13 11 9 7 5
HV3 HV2
–
SW SW
CH3 CH2
Address
space
2 0
allocation
3 1
HV1 16 bytes
SW SW 8 bytes
CH1 CH0
29