Yaskawa MEMOCON GL120 - Manual (Page 185)

4.4 Communications Modules
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Item Specification
MEMOBUS Port Specifications Communications
Method
Half-duplex stop-start synchronization
Transmission Levels Conform to RS-232C.
Protocol MEMOBUS protocol or any other protocol
Baud Rate 19,200/9,600/7,200/4,800/3,600/2,400/2,000/1,800/1,200/60
0/300/150 bps
Communications
Mode
RTU mode or ASCII mode
Data Format The following data format is used between the master and
slaves, between the master and modems, and between
modems and slaves:
1) Data bit length: 8 (RTU mode) or 7 (ASCII mode) bits
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
Yaskawa modem.)
Transmission
Error Detection
CRC-16 (RTU mode) or
LRC (ASCII mode)
Connector D-sub connector (9-pin, female)
4. Using MEMOBUS Modules (RS-232)
1) Number of Modules
Together with MEMOBUS Modules (RS-422) explained in 4.4.6 MEMOBUS Modules
(RS-422), two MEMOBUS Modules can be used.
2) Installation Location
MEMOBUS Modules (RS-232) can be mounted to any slot of the Mounting Base of any
Rack of the local channel. It will occupy one slot.
3) MEMOBUS Ports
a) Devices connectable to MEMOBUS ports are shown in the following table. Each of
these devices must be equipped with an RS-232C interface. In addition, depending
on the type of device, the MEMOBUS port settings will need to be altered. This set-
tings are altered using the DIP switch on the front of the Module. Refer to 4) DIP
Switch later in this section.
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