{"id":751,"date":"2023-11-27T15:50:40","date_gmt":"2023-11-27T14:50:40","guid":{"rendered":"https:\/\/dev.engiby.ch\/?page_id=751"},"modified":"2023-12-12T13:50:55","modified_gmt":"2023-12-12T12:50:55","slug":"modbus-tcp-trouble-shooting","status":"publish","type":"page","link":"https:\/\/engiby.ch\/cms\/web\/support\/modbus-tcp-trouble-shooting\/","title":{"rendered":"Modbus TCP Trouble shooting"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.22.2″ _module_preset=”default” custom_padding=”0px||0px||true|” global_colors_info=”{}”][et_pb_row _builder_version=”4.22.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_code _builder_version=”4.22.2″ _module_preset=”default” global_colors_info=”{}”]Accueil<\/a><\/span><\/span>[\/et_pb_code][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.22.2″ _module_preset=”default” custom_padding=”0px||0px||true|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_post_title meta=”off” featured_image=”off” _builder_version=”4.22.2″ _module_preset=”default” title_font=”|600|||||||” global_colors_info=”{}”][\/et_pb_post_title][et_pb_divider color=”#EEEEEE” _builder_version=”4.22.2″ _module_preset=”default” background_color=”RGBA(255,255,255,0)” global_colors_info=”{}”][\/et_pb_divider][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.22.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_row _builder_version=”4.22.2″ _module_preset=”default” custom_margin=”0px||0px||true|false” custom_padding=”0px||0px||true|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.22.2″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.22.2″ _module_preset=”default” custom_margin=”0px||0px||true|false” custom_padding=”0px||0px||true|false” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n

This document may help you to solve problems you may encounter when using the Modbus TCP protocol with the Engiby driver on Saia PCD\u00ae<\/sup>\u00a0<\/span>systems. Note that a good knowledge of the partner device is necessary to correctly configure the driver on the Saia PCD\u00ae<\/sup>.<\/p>\n

For trouble shooting Modbus RTU and ASCI (serial), please refer to this document:\u00a0<\/span>Modbus Trouble shooting<\/a><\/p>\n

Note also that a lot of information is also given in the Modbus FAQ documents
For Modbus 1 (obsolete) : at\u00a0<\/span>Modbus FAQ<\/a>
For Modbus 2 : at\u00a0<\/span>Modbus 2 Driver<\/a><\/p>\n

In very rare cases you may also encounter known and fixed problem of the driver itself. Here you can fined the list of the last modifications of the Modbus 2 driver :\u00a0<\/span>Modbus 2 History<\/a><\/p>\n

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Typical troubles with the Modbus Slave Driver<\/h2>\n

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No TCP communication
<\/span><\/strong>If no TCP connection is possible from the master, it is most probably a cabling problem, a bad network configuration or a configuration error of the Saia PCD\u00ae<\/sup>. In this case
check the cabling. LAN installations are generally of good quality, but ensure that all patch cables are placed correctly.
If you are connected over a router, ensure that the TCP or UDP port 502 is open and routed to the correct IP address.
Ensure that that Saia PCD\u00ae<\/sup>\u00a0<\/span>configuration is correct: IP communiation activated, correct IP address and subnet mask.
If possible try to establish a PG5 connection with the online option ‘SOCKET’ from the same point as the Modbus master. If this\u00a0<\/span>don’t work, don’t look further<\/span>\u00a0<\/span>for a Modbus problem.
These remarks are also valid if UDP is used.<\/p>\n

No response
<\/span><\/strong>TCP connection is possible but not replay is received by the master. Typical error are:<\/p>\n