Introduction

To use Protocol Macro instructions with E5CN-U Communications Protocol use the system protocol Compoway/F Master that is supplied with CX-Protocol and download it to the PLC.

PLC ladder can then be written to send protocol commands e.g.:
 

1. Communications Enable/Disable DM0000 = 0005    No. of SEND words DM0001 = 0001    NODE Number DM0002 = 3005    MRC-SRC DM0003 = 0004    No. of BYTES being sent DM0004 = 0001(Enable)    0000(Disable)   2. Run/Stop DM0000 = 0005    No. of SEND words DM0001 = 0001    NODE Number DM0002 = 3005    MRC-SRC DM0003 = 0004    No. of BYTES being sent DM0004 = 0100(Run)    0101(stop)   3. Read Status DM0000 = 0007    No. of SEND words DM0001 = 0001    NODE Number DM0002 = 0101    MRC-SRC DM0003 = 0012    No. of BYTES being sent DM0004 = C000   VARIABLE TYPE +1/2 ADDRESS DM0005 = 0100    1/1 ADDRESS + 00 DM0006 = 0001    No. of ELEMENTS Response DM0010 = 0004    No. of RECEIVED words DM0011 = 0000    RESPONSE CODE DM0012 = ****    First 16 Bits DM0013 = ****    Second 16 Bits   4. Read Process Value DM0000 = 0007    No. of SEND words DM0001 = 0001    NODE Number DM0002 = 0101    MRC-SRC DM0003 = 0012    No. of BYTES being sent DM0004 = C000   VARIABLE TYPE +1/2 ADDRESS DM0005 = 0000    1/2 ADDRESS + 00 DM0006 = 0001    No. of ELEMENTS Response DM0010 = 0004    No. of RECEIVED words DM0011 = 0000    RESPONSE CODE DM0012 = ****    Lower 4 digits in HEX DM0013 = ****    Upper 4 digits in HEX   5. Change Set Value DM0000 = 0009    No. of SEND words DM0001 = 0001    NODE Number DM0002 = 0102    MRC-SRC DM0003 = 0020    No. of BYTES being sent DM0004 = C100   VARIABLE TYPE +1/2 ADDRESS DM0005 = 0300    1/2 ADDRESS + 00 DM0006 = 0001    No. of ELEMENTS DM0007 = 0000(HEX)    Upper 4 digits of SV DM0008 = 00FF(HEX)    Lower 4 digits of SV (eg 255) Response DM0010 = 0004    No. of RECEIVED words DM0011 = 0000    RESPONSE CODE DM0012 = ****    First 16 Bits DM0013 = **** Second 16 Bits     Bit Position Status Bit Description Bit Description     0 1 0 Heater overcurrent (CT1) Not generated  Generated 1 Heater current hold (CT1) See Note1) Update  Hold 2 HB (heater burnout) error Not generated  Generated 3 HS alarm output (CT1) OFF  ON 4 Spare OFF  --- 5 Display range exceeded Not generated  Generated 6 Input error Not generated  Generated 7 Spare OFF  --- 8 Control output (heating) OFF  ON 9 Control output (cooling) OFF  ON 10 HB (heater burnout) alarm output (CT1) OFF  ON 11 HB (heater burnout) alarm output (CT2) OFF  ON 12 Alarm output 1 OFF  ON 13 Alarm output 2 OFF  ON 14 Alarm output 3 OFF  ON 15 Program end output OFF  ON 16 Event input 1 OFF  ON 17 Event input 2 OFF  ON 18 Spare OFF  --- 19 Spare OFF  --- 20 Write mode Backup mode  RAM write mode 21 EEPROM RAM=EEPROM  RAM=EEPROM 22 Setup area Setup area 0  Setup area 1 23 AT execute/cancel AT cancelled  AT execution in progress 24 RUN/STOP Run  Stop 25 Communications writing OFF (disabled)  ON enabled 26 Auto/manual switch Automatic mode  Manual mode 27 Spare OFF  --- 28 Heater overcurrent (CT2) Not generated  Generated 29 Heater current hold (CT2)(See note 1) Update  Hold 30 Spare OFF  --- 31 HS alarm output (CT2) OFF  ON Note 1 - When the control output ON time is less than 190 ms, the bit is set to '1' and the heater current is held at the last current value. Note 2 - 'Spare' bits are always OFF. Note 3 - When read in setup area 1, the status of the bits will always be as follows: Overcurrent: Last value held HB error: Last value held Input error: Last value held HB and HS outputs: Cleared Program end output: Cleared Current hold: Last value held Display range exceeded: Last value held Heating and cooling outputs: Cleared Alarm outputs: Cleared