| The serial drivers PCxI, MCxI, COMxI or
COMx may be used.
Setup the PLC with the appropriate communication parameters i.e.
7 data bits, 19200, no parity, 1 stop bit and format 1 protocol and
station number.
| I/O Devices
form
|
|
| Name: |
User supplied unique
name
|
| Number: |
Network wide I/O
device number
|
| Address: |
PLC unit number 0
to 31 |
| Protocol: |
MELSEC for
MELSEC-A
MELSEC1 for MELSEC-AnA |
| Port name: |
Use the "Port
name" from the Ports form |
Standard citect.ini options
[MELSEC]
MaxPending = 2
Block = 24 bytes
Retry = 0
Delay = 5 milliseconds
TimeOut = 2000 milliseconds
PollTime = 0
WatchTime = 30 seconds
Files
- MELSEC.DLL - The MELSEC driver for windows
- MELSEC.DBF - The MELSEC-A variable template
- MELSECA.DBF - The MELSEC-AnA variable template
MELSEC Variables
| Digital
|
Low
|
High
|
Purpose
|
| Xx
|
0
|
0xfff
|
Input
|
| Yx
|
0
|
0xfff
|
Output
|
| Bx
|
0
|
0x3ff (0xfff)
|
Link relay
|
| Md
|
0
|
2047 (8191)
|
Internal relay
|
| Ld
|
0
|
2047 (8191)
|
Latch relay
|
| Fd
|
0
|
255 (2047)
|
Annunciator
|
| Md
|
9008
|
9255
|
Special relay
|
| TSd
|
0
|
255 (2047)
|
Timer (Contact)
|
| TCd
|
0
|
255 (2047)
|
Timer (coil)
|
| CSd
|
0
|
255 (1023)
|
Counter
(contact)
|
| CCd
|
0
|
255 (1023)
|
Counter (coil)
|
| Integer/Long/BCD/LongBCD/String
|
| Wx
|
0
|
0x3ff (0xfff)
|
Link register
|
| TNd
|
0
|
255 (2047)
|
Timer (present
value)
|
| CNd
|
0
|
255 (1023)
|
Counter (present
value)
|
| Dd
|
0
|
1023 (6143)
|
Data register
|
| Rd
|
0
|
8191
|
File register
|
| Dd
|
9000
|
9255
|
Special register
|
| Where
|
x is the
address in hexadecimal
|
|
|
d is the
address in decimal
|
|
|
number in
bracket are the high limit for MELSEC-AnA PLC
|
|
