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Found 2 results

  1. Hi all I am using a V430-j-t38 with add on Ethernet card. The problem I am experiencing is with the built in Com port, I have set the dip switches to rs485 and we use this port as a Modbus slave from a Motorola Ace3600, I am being sent a Vector of values in MI 141,142,143 The problem is my plc interprets the information wrong and loads all the data into MI 141 as 19456 when at the moment it should be 36, 1796 & 666 but the current values it should send don't really matter I seem to just get 19456 The data being sent doesn't seem to be a problem nor does the PLC really because through testing we have tried, A samba running same code as v430 slave but with add on rs485 port - works correctly The V430 using an rs485 instead of Ethernet add on port - works correctly The samba as master sending data to the V430 through inbuilt port also works correctly The problem only is when using the inbuilt port connecting to the Motorola PLC Can anyone make any suggestions? I know its not the Modbus config or com init blocks because it is receiving data its just messing up the values somewhere Thanks Kieran
  2. Hello, We have a problem with Unitronics Jazz 2 series PLCs (JZ20-R31, +adapters MJ20-RS) trying to connect to modbus communication line. The problem is we cant initializate RS-485 com port, every configuration are restored to factory default (9600;7;1;even;n) after RS-485 cable connection to PLC and in system menu it is impossible to change communication parameters if RS-485 cable is connected (RS-232 com port we do not use). We do not have any problems with Jazz 1 series plcs using almost same program, same configuration. + U90 ladder we are using last version (v6.4.9) + Unitronics 2 series OS is last version (V2.30 (B08)) + Communication line is good (we checked). + We have two Jazz 2 series plcs with same problem. P.S sorry for my english.
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