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Using Protocol Macro Communications With E5CN


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
 




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Created 2008-10-14
Modified 2009-04-02
Views 4955

 

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