Page 68
= Key 1
= Key 2
= Key 3
= Maximum or consumption = Minimum or supply.
Higher protocol
Dependant on the format of the measured values to be
transmitted,
up to 21 measured values
can be transmitted
from UMG 503 to PLC by PROFIBUS DP protocol
cyclically
.
To transmit more measured values from UMG 503 than
determined in the GSD file, you must use a GSD file,
which determines the values to be transmitted during
operation.
With the program
PSWbasic,
which belongs to the con-
tents of delivery, a GSD file is created.In this GSD-file a
32 words large output range and a 28 words large input
range is determined.
In the output range, the PLC can save the desired measu-
red value addresses in the control words 4 to 32 and in
the input range, the corresponding measured values can
be retrieved in the control words 2 to 28. A control word
consists of 2 Byte.
For controlling purpose, a number is sent by each request
for new measured values. The requested measured va-
lues are written to the input range, when the PLC replies
the request number.
Please note, that the request number must be written to
the measured value addresses into the output range befo-
re, as thereby it is ensured, that the read measured values
correspond to the new measured value addresses.
With the
"higher protocol"
you can call up data from
the following tables:
Table 1a
- Measured values, floating point format
Table 1b
- Measured values, floating point format
Table 2
- Energy, floating point format
Table 3a
- Time information (Min. and max. values)
Table 3b
- Time information (Min. and max. values)
Table 6a
- Measured values, integer format
Table 6b
- Mean values, integer format
Table 6c
- Maximun values, integer format
Table 6d
- Minimum values, integer format
Table 8
- Scale of measured values
The measured values from table 4 are scaled by the
addresses in table 3.
The scaling of the measured values depends on the ratios
for current and voltage transformer set at UMG 503 and
must be read by changing the ratios only.
The output and input range can be read out and overwrit-
ten by the control words 1 and 2 from PLC.
With the "Remote bits" an output is selected for con-
trolling by the PLC.
Profibus DP V0
In Profibus version "DP V0" only a cyclic data transmis-
sion is possible between master PLC and slave UMG503.
The transmission data have been determined in the GSD
file and the PLC has to request this data set from
UMG503 (Slave).
Profibus DP M1
In Profibus version (DP M1) even none cyclical data can
be retrieved additionally to the cyclic data. Please note,
that calling none cyclical data (DP M1) takes a longer
time than using cyclical communication services (DP
V0).
The functional expansion for none cyclical data trans-
mission is specified according to the technical directive
2.082.
