System information

General Reference Guide IO Servers Configuration
RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 134
• Status register:
The STATUS Tag is a special Tag that returns information about the current state of communication for a given device. As for the other Tags, the
status Tag ValueName is composed of:
Status, Global Device Address
• You can define a status Tag for each PLC used.
• If you use the status address, the Tag must be configured as analog.
5.13.3.2 Global Device Address
The device address is either appended to the ValueName in the Item Name definition or entered in the Topic global address fields.
The device address is composed like the following:
5.13.3.2.1 ISOTCP polling:
You can always use the TSAP 4D.57. This is the default TSAP for a Step 7-Micro/win connection.
If you specify your own connection in the S7-200, be sure to:
- use the same TSAP for the Server and the Client (ex: Local TSAP:12.00, Remote TSAP:12.00)
- Check the "Enable the Keep Alive function for this connection" feature for this connection otherwhise the eWON will not be able to poll the
device after a connection lost due to the eWON reboot.
Important:
If the PLC address is defined at the Topic level, it can be omitted in the Tag definition. In that case the Tag name will only contain
the "ValueName".
If the PLC address is specified at the Topic level, it will replace any address defined Tag by Tag.
0
Communication not initialized. Status UNKNOWN.
If no Tag is polled on that device address, the communication status is unknown.
1 Communication OK.
2 Communication NOT OK.
Table 110: Tag Status meaning
PPI
PPI, PPI node address
node address: PPI node address of the PLC
Reach by PPI the PLC with the node address 4
ISOTCP
ISOTCP, IP address, CalledTSAP
IP address : IP address of the PLC (ex: 10.0.120.204)
Called TSAP : Transport Service Access Point (ex: 4D.57)
Reach by ISOTCP the PLC at IP 10.0.120.204 with the TSAP 4D.57
Table 111: PPI/ISOTCP device address syntax