Yaskawa MEMOCON GL120 - Manual (Page 169)

4.4 Communications Modules
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Item Specifications
MEMOBUS Port Specifications Communications Method Half-duplex stop-start synchronization p
Transmission Levels Conform to RS-232C
Protocol MEMOBUS protocol or any other protocol
Baud Rate 19,200/9,600/7,200/4,800/3,600/2,400/2,000/
1,800/1,200 bps
Communications Mode RTU mode or ASCII mode
Data Format The following data format is used between master and
slaves, between master and modems, and between
modems and slaves:
1) Data bit length: 8 (RTU mode) or 7 (ASCII mode)
2) Parity check: Yes or No
3) Parity: Odd or even
4) Stop bits: 1 or 2
Transmission Distance 15 m (Can be extended to 4.5 km maximum by using a
Yaskawa modem.)
Transmission Error
Detection
CRC-16 (RTU mode) or
LRC (ASCII mode)
Connector D-sub connector (9-pin, female)
4. Using Remote I/O Receiver Modules
1) Number of Modules
Fifteen Remote I/O Receiver Modules can be connected to each Remote I/O Driver Mod-
ule.
2) Installation Location
a) A Remote I/O Receiver Module can be mounted to any slot on the Mounting Base of
Rack 1 of a remote station.
b) Normally, a Remote I/O Receiver Module is mounted to the slot next to the Power
Supply Module on the left hand side of Rack 1.
3) Remote I/O Port
a) The Remote I/O Driver Module runs high-speed communications of 4Mbps through
the remote I/O port with Remote I/O Receiver Modules. The transmission distance
varies according to the baud rate and specifications of coaxial cable. If, for example,
the baud rate is 4 Mbps and 12C-5AF Coaxial Cable is used, it is possible to transmit
up to 1 km max.
b) An example of connecting a Remote I/O Driver Module and Remote I/O Receiver
Modules is shown on the next page.
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