Product description
Wieland Electric GmbH | BA000970 | 11/2016 (Rev. F)
Data received from the network (network output data sets)
910751627
The data from data set 1 (max. 50 bytes) received from the network may be differently arran-
ged, depending on the protocol. For the Modbus TCP, this data set was divided into five data
blocks, each with 10 bytes. In the SP-PROFIBUS-DP gateway, output data blocks 1-4 each
contain 12 bytes, while output data block 5 contains 2 bytes. CANopen only defines 4 data
blocks, each with 8 bytes.
Table 13: Output data block 1–5 of the various gateways
Size of output data block
SP-PROFIBUS-DP /
12 bytes 12 bytes 12 bytes 12 bytes 2 bytes
SP-EN-ETC /
Modbus TCP /
10 bytes 10 bytes 10 bytes 10 bytes 10 bytes
The content of the output data blocks can be used in the logic editor, as well as made available
for another network via a second gateway within the samosPRO system.
• In order to use network data in the logic editor or as input for another network, you must
assign a tag name for each bit to be used.
•
Bits without specific tag names will not be available in the logic editor or for routing via a
second gateway. Detailed information about how to assign tag names for the data recei-
ved may be found in the corresponding sections of the chapters on the various gateways.
•
You can monitor current communication with the network with the aid of input data state
bits for receiving data from the network and the output data state bit for transmitting da-
ta to the network in the logic editor. When the gateway detects a communication error,
both the content of the data sets and the associated state bit are set to zero (logical 0).
• When all communication fails, the data of the output data sets and the input data state
bit are set to zero (logical 0).
• W
hen a connection is closed while others remain available, the LED MS or LED state will
flash red/green for a total of 10 seconds and an entry will be made in the error log. In this
case the state bits are not affected.
ATTENTION
Do not use the same output data block number for two different PLC connections or
TCP/IP sockets!
The output data block of the Ethernet gateways can be described in parallel via all communi-
cation interfaces or TCP/IP sockets (e.g. Modbus TCP/IP and Ethernet TCP/IP) if they make
use of the same output data block number. In this case the last message will always overwri-
te the data received earlier.
To Next Page
Loading...