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en:sw:02-apis:02-modbus-tcp [2020/05/15 08:06]
avsetula
en:sw:02-apis:02-modbus-tcp [2021/05/07 08:26]
avsetula
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 ~~NOTOC~~ ​ ~~NOTOC~~ ​
 ====== Modbus TCP Server ====== ====== Modbus TCP Server ======
 +<WRAP group>
 +<WRAP half column 81%>
 Modbus TCP is standard interface to interact with the IOs of Unipi PLCs. Each PLC has its own mapping of I/O to a Modbus Register or Coil which can be downloaded from the [[files:​products:​00-start|Products section.]] Modbus TCP is standard interface to interact with the IOs of Unipi PLCs. Each PLC has its own mapping of I/O to a Modbus Register or Coil which can be downloaded from the [[files:​products:​00-start|Products section.]]
 +</​WRAP>​
 +<WRAP half column 15%>
 +;;#
 +<​html><​span class="​dev-tag dev-patron">​Patron</​span></​html>​ \\
 +<​html><​span class="​dev-tag dev-neuron">​Neuron</​span></​html>​ \\
 +<​html><​span class="​dev-tag dev-axon">​Axon</​span></​html>​
 +;;#
 +</​WRAP>​
 +</​WRAP>​
  
-<WRAP center round info 60%>+<WRAP center round info 90%>
 1Wire devices are not mapped to Modbus TCP and have to be implemented differently,​ eg. using OWFS. 1Wire devices are not mapped to Modbus TCP and have to be implemented differently,​ eg. using OWFS.
-</W +</WRAP> 
-RAP+ 
-==== Systemd service ==== + 
-The Modbus TCP server interface is provided by a unipitcp service. By default, the server only listening ​to request on the local loopback ​and requests ​from other hosts are forbidden due to security reasons. To change this, the unipitcp has to be run with the parameter "​-l 0.0.0.0"​ (-L). If you wish, you can also change the listening port in parameter -p to a different one.+===== Storage life status ===== 
 +There are also registers indicating storage status for all Unipi controllers (except Unipi 1.1) that are available on the Modbus TCP server. 
 +  * <html><span class="​kbBlueText">​Erase cycles used [%]</​span></​html>​ -> indicates the number of memory erase cycles compared to the maximum cycles (in percent) 
 +  * <​html><​span class="​kbBlueText">​Good blocks [%]</​span></​html>​ -> indicates the number of blocks that are all right (in percent) 
 + 
 +For Neuron units, there is also the number of power cycles (on/off) available with the current SD card, or the name of the card manufacturer'​s detection. For Neuron units, only a limited selection of SD cards is supported for these features. 
 + 
 + 
 +===== Systemd service ​===== 
 +The Modbus TCP server interface is provided by a unipitcp service. By default, the server only listens ​to request on the local loopback. Requests ​from other hosts than 127.0.0.1 ​are forbidden due to security reasons. To change this, the unipitcp has to be run with the parameter "​-l 0.0.0.0"​ (-L). If you wish, you can also change the listening port in parameter -p to a different one than the default 502.
  
 <​code>​ <​code>​
-/opt/unipi-bin/​unipi_tcp_server -p 502 -l 0.0.0.0+/opt/unipi/tools/​unipi_tcp_server -p 503 -l 0.0.0.0
 </​code>​ </​code>​
  
-To make the change permanent, modify the service script in /lib/systemd/system/​unipitcp.service and reload ​and restart the service by <​code>​systemctl daemon-reload</​code>​ and <​code>​systemctl restart unipitcp</​code>​+To make the change permanent, modify the default configuration file **/etc/default/unipi-modbus-tools** ​and restart the service by <​code>​systemctl restart unipitcp</​code>​