9440300990 Rev J
239
DECS-250
PROFIBUS Communication
Table 38 shows the bit number of each parameter in instance 11 and an example packet returned from a
DECS-250. Reading a value of 0xA4 06 (1010 0100 0000 0110) for instance 11 indicates that contact
outputs 2, 5, 7, 9, and 10 are closed. The first byte is 1010 0100 and the second is 0000 0110.
Table 38. Instance 11 Bit Order
Instance
Number
Byte Number
Bit Number
Key Name
Packet Returned from
DECS-250
11
1
0
CONTACTOUTPUTS WATCHDOG
0
1
CONTACTOUTPUTS OUTPUT1
0
2
CONTACTOUTPUTS OUTPUT2
1
3
CONTACTOUTPUTS OUTPUT3
0
4
CONTACTOUTPUTS OUTPUT4
0
5
CONTACTOUTPUTS OUTPUT5
1
6
CONTACTOUTPUTS OUTPUT6
0
7
CONTACTOUTPUTS OUTPUT7
1
2
0
CONTACTOUTPUTS OUTPUT8
0
1
CONTACTOUTPUTS OUTPUT9
1
2
CONTACTOUTPUTS OUTPUT10
1
3
CONTACTOUTPUTS OUTPUT11
0
4
0 (unused)
0
5
0 (unused)
0
6
0 (unused)
0
7
0 (unused)
0
Setup
The following steps are provided to assist in setting up the DECS-250 as a slave on a PROFIBUS
network. Please refer to the documentation included with your PLC configuration software for installation
and operation instructions.
1.
Download the DECS-250 GSD file from the Basler website: www.basler.com
2.
Using PLC configuration software, import the GSD file. This allows the DECS-250 to be included in
the bus configuration as a slave.
3.
Assign a unique PROFIBUS address to the DECS-250. This allows the master to exchange data with
the DECS-250.
4.
Select modules from the GSD file to be part of the data exchange. Selecting the cyclic parameters is
recommended. The cyclic parameters are comprised of the first 12 instances in the PROFIBUS
parameters table (Table 39). The first 25 parameters, which make up the first five instances, are float
types. The next 59 parameters, which make up the last seven instances of cyclic parameters, are
UINT8 types.
5.
Set each selected module to an address in the master's memory bank.
6.
Compile and download the configuration to the master before going online.
When the PROFIBUS network is initialized, the master connects to each slave checking for address
mismatches and sending configuration data. The configuration data is sent so that the master and slave
agree on the data exchange to occur. Then, the master begins polling each slave in a cyclic order.
Note
It is not possible to write a portion of an instance by specifying a length
smaller than the size of the instance. To modify a single parameter,
read the entire instance, update the desired parameter, and write the
entire instance back to the device.
Содержание DECS-250
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Страница 108: ...92 9440300990 Rev J Power System Stabilizer DECS 250 Figure 85 PSS Function Blocks and Software Switches ...
Страница 114: ...98 9440300990 Rev J Power System Stabilizer DECS 250 Figure 96 PSS Parameter Settings ...
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Страница 126: ...110 9440300990 Rev J Mounting DECS 250 Figure 103 Overall and Projection Mounting Dimensions ...
Страница 127: ...9440300990 Rev J 111 DECS 250 Mounting Figure 104 DECS 250 Escutcheon Plate Dimensions ...
Страница 128: ...112 9440300990 Rev J Mounting DECS 250 Figure 105 Panel Cutting and Drilling Dimensions for DECS 250 Panel Mounting ...
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Страница 316: ...300 9440300990 Rev J Specifications DECS 250 ...
Страница 334: ...318 9440300990 Rev J Analog Expansion Module DECS 250 ...
Страница 341: ...9440300990 Rev J 325 DECS 250 Contact Expansion Module Figure 188 CEM 2020 Input Contact and Output Contact Terminals ...
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