eWON General Reference Guide - eWON wiki
eWON General Reference Guide - eWON wiki
eWON General Reference Guide - eWON wiki
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5.13.2.2 COM configuration (serial port)<br />
<strong>General</strong> <strong>Reference</strong> <strong>Guide</strong> IO Servers Configuration<br />
Figure 110: PPI link configuration<br />
Parameter Description<br />
COM Port Choose your COM port (only on <strong>eWON</strong>4002)<br />
Baud Rate Speed of the PPI port. Available speeds are 9600, 19200 Bauds or disable<br />
Parity The parity to apply (None / Even /Odd)<br />
Databits Number of bits in data (7 or 8)<br />
Stop bit(s) Number of Stop bits (1 or 2)<br />
HW mode<br />
Choose the Hardware mode of communication: Half-Duplex by default<br />
or Full Duplex with/without hardware handshaking.<br />
Reply Timeout Maximum time the <strong>eWON</strong> will wait for a valid PPI message response<br />
PPI Address Device address of <strong>eWON</strong> on PPI link (0..126, default is 0)<br />
By default, <strong>eWON</strong> with Serial port will act as MonoMaster on the PPI link.<br />
5.13.2.2.1 Serial PPI MultiMaster configuration<br />
To configure the serial port as PPI MultiMaster you need to configure the following parameters.<br />
Figure 111: PPI Multimaster configuration parameters<br />
Serial Multimaster<br />
Description<br />
Parameter<br />
StatusInterleave number of token messages sent by the <strong>eWON</strong> before one status request message is sent out.<br />
Status messages are used to get the configuration of the network. In the case interleave<br />
number is high bandwith is used more efficiently for data exchange but network discovery and<br />
recovery is slow.<br />
- default value: 0 (<strong>eWON</strong> is mono master no exchange of status or token pass messages)<br />
- value range: 0..20<br />
NbrPollRetry number of retrials for one user request (poll = ask for the response after reception of a positive<br />
ack from the PLC) before aborting the request. Usefull in case of high PLC load.<br />
- default value: 15<br />
- value range: 0..100 (0 means only one poll for one request)<br />
NbrGwRetry number of retrials for one gateway request (poll = ask for the response after reception of a<br />
positive ack from the PLC) before aborting the request. Usefull in case of bus confict due to<br />
high PLC load (reception of lot of nacks).<br />
- default value: 15<br />
- value range: 0..100<br />
HSA Highest station active<br />
- default value: 31<br />
value range: 15..127<br />
Table 118: Serial PPI MultiMaster<br />
RG-001-0-EN ver 1.14 <strong>eWON</strong>® - 02/05/2012 - ©<strong>eWON</strong> sa Page 143