Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 1 / 12 tmd-t4 temperature monitoring device communication protocol instruction manual im148-u-ab v0.92 firmware version: v3.0 or higher.
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 2 / 12 index 1) tmd-t4 modbus-rtu communication protocol 3 modbus protocol 2) crc generation 4 3) reading of the registers (function code $ 03) 5 4) setup of the tmd parameters (function code $ 10) 6 5) diagnostic (function cod...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 3 / 12 tmd-t4 modbus-rtu communication protocol modbus protocol modbus is a master-slave communication protocol able to support up to 247 slaves organized as a bus or as a star network; the physical link layer can be rs232 for ...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 4 / 12 crc generation example of the crc-16 generation with "c" language: static unsigned char auchcrchi [ ] = { 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, 0x41, 0x01, 0xc0, 0x80, 0x41, 0x00, 0xc1, 0x81, 0x40, 0x01, 0xc0, 0x80, ...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 5 / 12 reading of the registers (function code $ 03) reads the binary contents of holding registers ( 2x references) in the slave. Broadcast is not supported. The query message specified the starting register and quantity of re...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 6 / 12 setup of the tmd parameters (function code $ 10) write values into a sequence of holding registers (2x references). Warning: it is possible to write more than one variable at the same time only if their addresses are con...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 7 / 12 diagnostic (function code $ 08) this function provides a test for checking the communication system. Broadcast is not supported. The instrument’s protocol has only the sub-function 0 of the diagnostics sub-functions set ...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 8 / 12 report slave id (function code $ 11) this function returns the type of the instrument and the current status of the slave run indicator. Broadcast is not supported. The query and the response messages are the following: ...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 9 / 12 error message from slave to master when a slave device receives a not valid query, it does transmit an error message. Response: start of frame address field function code error code error check end of frame start of fram...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 10 / 12 table of tmd registers this table is referred to the tmd-t4 device with 4 input channels and tmd-t8 device with 8 input channels. Decimal value is calculated as follow dec. Value = (msb byte *256) + lsb byte instantaneo...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 11 / 12 reset max temperature register (write only) register 0x27f, 2 byte wide; write the 0xa55a value in these register to reset the peak temperature registers; only the value 0xa55a is accepted; other value are discarded ala...
Tmd-t4 protocol communication - instruction manual im148-u-ab v0.92 pag. 12 / 12 ____________________________________________________________________________________________ abb s.P.A. Abb sace division viale dell’ industria, 18 20010 vittuone (mi) – italy tel.: 02.9034.1 – telefax: 02.9034.7609 htt...
