Acyclic Data Transfer - Endress+Hauser iTEMP TMT184 PROFIBUS-PA Manuel De Mise En Service

5 Operation
60
Status Code
0x80
0x81
0x82
0x83
0x84 NC_OK_UPDATE_EVENT
0x85 NC_OK_UPDATE_EVENT
0x86 NC_OK_UPDATE_EVENT
0x87 NC_OK_UPDATE_EVENT
0x8C NC_OK_CRIT_ALARM
0x8D NC_OK_CRIT_ALARM
0x8E NC_OK_CRIT_ALARM
0x8F NC_OK_CRIT_ALARM
0x88 NC_OK_ADVISORY_AL
0x89 NC_OK_ADVISORY_AL
0x8A NC_OK_ADVISORY_AL
0x8B NC_OK_ADVISORY_AL
5.2.5

Acyclic data transfer

The acyclic data transmission is for transmitting parameters during commissioning, for maintenance
or for display of other measurements that are not contained in the cyclic data traffic.
Generally a difference is made between class 1 and class 2 master connections. A class 2 master is
allowed on the TMT184 temperature head transmitter. When reading parameters by a class 2 mas-
ter a request telegram is sent from the class 2 master to the field unit using the field unit address,
slot and index as well as the expected data length. The field unit answers using the requested data
set, if this exists and has the correct length (in byte).
When writing parameters using a class 2 master the slot and index, lengths (byte) and data set are
transmitted as well as the field unit address. The slave acknowledges this write command once it is
finished. Using a class 2 master access to the blocks, that are indicated in the following figure is per-
mitted.
The parameters, that are operated using the E+H operation programme (Commuwin II) are dis-
played in the form of a matrix (page 62).
Fig. 5.3: Function block model of the TMT184 PROFIBUS-PA
Meaning Unit condition
NC_OK
NC_OK
NC_OK
NC_OK
®
Limits
GOOD OK
GOOD LOW_LIM
GOOD HIG_LIM
GOOD CONST
GOOD OK
GOOD LOW_LIM
GOOD HIG_LIM
GOOD CONST
GOOD OK
GOOD LOW_LIM
GOOD HIG_LIM
GOOD CONST
GOOD OK
GOOD LOW_LIM
GOOD HIG_LIM
GOOD CONST
Endress+Hauser
TMT184