Yaskawa MP940 - Manual (Page 105)

MP940 Functions
4.2.6 Serial Communications Protocol
4-12
„ MELSEC Communications
MELSEC Communications Specifications
The following table shows the general specifications for MELSEC communications, and
which of these specifications are supported by the MP940.
Table 4.3 MELSEC Communications Specifications
000003
000002
000001 MB000002
［ MP9□□］
MB000001
MB000000
MB001002
［ MP9□□］
MB001001
MB001000
Another MEMOBUS device
Coil Coil
Coil
MEMOBUS message
Offset: 0 (default)
Offset: 100
General MELSEC Specifications
MELSEC Specifications Supported by
the MP940
Transmission Method RS-232C: Half-duplex, full-duplex
RS-422: Half-duplex RS-232C: Full-duplex
(Half-duplex for procedural)
RS-485: Half-duplex
Synchronization Start-stop synchronization Start-stop synchronization
Baud Rate 300/600/1200/2400/4800/9600/19200 bps 19,200 bps
Data Format Data: 8 or 7 bits
Parity: Odd, even, none
Stop bits: 1 or 2 bits Data: 8 or 7 bits
Parity: Odd, even, none
Stop bits: 1 or 2 bits
Error Detection With or without checksum With checksum
DTR/DSR (ER/DR) Control Yes/No (RS-232C only) Both controls are
possible. None
DC1/DC3, DC2/DC4
Control Yes/No
Transmission Protocol Special protocol Only protocol type 1 is supported.
Type 1
(1:1, 1:N, N:N)
Type 2
Type 3
Type 4
No protocol (1:1, 1:N)
Full duplex (1:1)