4 MODBUS RTU Protocol 4 MODBUS RTU Protocol 4.1 Message Configuration ID Number Function Code Data 1 Byte 1 Byte N Byte 2 Byte 4.2 ID Number (Slave Address) Range: 1~255. Master instrument identifies slave controllers by the ID Number of the requested message.
4 MODBUS RTU Protocol ⑧ . Repeat step 3~5, until last data is processed. ⑨ . Swap the low byte and high byte of Y. ⑩ . CRC=Y 4.6 Abnormal Code Abnormal Code Contents 01 (01H) Illegal function code (Non-existent function code) 02 (02H) Illegal register address (Register address is out of range) 03 (03H)
4 MODBUS RTU Protocol Response from slave controller in abnormal status (Assumed as illegal data value) ID Number Function Code Error Code (01H) (86H) (03H) (0261H) 1 is set to the MSB of function code in abnormal status (86H). The abnormal code (03H) is returned as contents of error. 4.7.3 Setting (Set SV = 10.0 and OUTL=100.0 to slave controller 1) Request message from master instrument:...
5 MODBUS ASCII Protocol 5 MODBUS ASCII Protocol 5.1 Message Configuration Header ID Number (Function Code) Data Delimiter (CR+LF) 1 Byte 2 Byte 2 Byte 2N Byte 2 Byte 2 Byte 5.2 ID Number(Slave Address) Range: 1~255 Master instrument identifies slave controllers by the ID Number of the requested message.
5 MODBUS ASCII Protocol 5.6 Abnormal Code Abnormal Code Contents 01 (30H 31H) Illegal function code (Non-existent function code) 02 (30H 32H) Illegal register address (Register address is out of range) 03 (30H 33H) Illegal data value (Data value is out of setting range) 5.7 Message example of ASCII mode Reading ( Read PV from slave controller 1) Request message from master instrument:...
5 MODBUS ASCII Protocol Response from slave controller in abnormal status (Assumed as illegal data value) Header ID Number Function Error Code Delimiter Code (3AH) (30H 31H) (38H 36H) (30H 33H) (37H 36H) (0DH 0AH) 1 is set to the MSB of function code in abnormal status (86H). The abnormal code (03H) is returned as contents of error.
Add all the values from “Command” to the end of “Data”. The result is Check Sum (1 byte). EX:52H + 01H + 00H +8AH +00H +00H = DDH 6.7 Message example of TAIE Protocol 6.7.1 Read ( Read PV from slave controller 1)
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7 Register Map 7 Register Map MODBUS Register Address Parameters Setting Range Function Code DECIMAL 0000 03/06/10H Set Point OUTL 0001 03/06/10H 0 ~ 1000 Output Limit 0000H=NO 0002 03/06/10H Auto Tuning 0001H=YES 0003 03/06/10H Alarm 1 set value 0004 03/06/10H Alarm 2 set value 0005...
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7 Register Map MODBUS Register Address Parameters Setting Range Function Code DECIMAL TM_2 Run Time of Seg.2 000D 03/06/10H (Pattern 1) OUT2 Output Limit of Seg.2 000E 03/06/10H (Pattern 1) SV_3 Set Point of Seg.3 000F 03/06/10H (Pattern 1) TM_3 Run Time of Seg.3 0010 03/06/10H...
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7 Register Map MODBUS Register Address Parameters Setting Range Function Code DECIMAL TM_6 Run Time of Seg.6 0019 03/06/10H (Pattern 1) OUT6 Output Limit of Seg.6 001A 03/06/10H (Pattern 1) SV_7 Set Point of Seg.7 001B 03/06/10H (Pattern 1) TM_7 Run Time of Seg.7 001C 03/06/10H...
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7 Register Map MODBUS Register Address Parameters Setting Range Function Code DECIMAL TM_22 Run Time of Seg.2 0025 03/06/10H (Pattern 2) OUT22 Output Limit of Seg.2 0026 03/06/10H (Pattern 2) SV_32 Set Point of Seg.3 0027 03/06/10H (Pattern 2) TM_32 Run Time of Seg.3 0028 03/06/10H...
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7 Register Map MODBUS Register Address Parameters Setting Range Function Code DECIMAL TM_62 Run Time of Seg.6 0031 03/06/10H (Pattern 2) OUT62 Output Limit of Seg.6 0032 03/06/10H (Pattern 2) SV_72 Set Point of Seg.7 0033 03/06/10H (Pattern 2) TM_72 Run Time of Seg.7 0034 03/06/10H...
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7 Register Map MODBUS Register Address Parameters Setting Range Function Code DECIMAL HYS1 003F 03/06/10H 0~1000 OUT1 Hysteresis 0040 03/06/10H 0~2000 OUT2 Proportional Band 0041 03/06/10H 0~3600 OUT2 Integral Time 0042 03/06/10H 0~900 OUT2 Derivative Time CYT2 0043 03/06/10H 0~150 OUT2 Cycle Time HYS2 0044...
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