CHAPTER 13 RS-485 COMMUNICATIONS
13.2 PC Loader Communications
The transmission and reception commands of the RYHF5-VV2 type servo amplifier are described
in details in this section.
The RYHF5-VV2 type servo amplifier is capable of reading data and writing parameters via serial
communications.
13.2.1 Station Number
The station number to the servo amplifier (parameter PA2_72: station number) setting determines the
station number of the message. After changing the parameter, by shutting down and turning on the
power, the station number will be enabled.
13.2.2 Communication Specifications
RRSS4-845 8C5omCmuonmicamtiuonnicSapeticoinfiscaStpioencifications
Item
Signal level
Synchronization method
Communication method
Transmission speed
Transmission code
SSppeeccifificicaatitoionns
RRSS-448855
Asynchronous, no protocol
4-wire type, semi-duplex communication
9600/199220000//3388440000/1b1p5s2(0S0ebt past p(SaertamateptaeraPmAet2e_r7P2A.)2_73.)
8 bits
Transmission
configuration
Start bit: 1 bit
Data bit: 8 bits
Parity bit: 1 bit (even)
Stop bit: 1 bit
Transmission control
Error control
Transmission length
Transparent mode (No separation with DLE character)
Check sum
Reception 128 bytes, transmission 128 bytes (max.)
One-to-n communniiccaattiioonns((11≦≤nn≤≦1)31)
The servo ampliiffiieerr ffuunnccttiioonnssaassaasslalavveeaannddrerespspoonnddsstotommasatsetrercocmommmanadnsd.s.
No communicationnsiasrme madaedbeebtwetweeenenslsalvaevse.s.
Transmission format
MMaasstteerr
(G(Geneenrearla-pl-uprupropsoesPeCP)C)
((GGeenneerraal-l-ppuurprpoosesecocommmmunuinciactaiotinosn))
Slave 1 Slave 2 Slave 3
Slave 31
Total wiring length
Station No.
Connection cable
Terminator treatment
500mm
1 to 31 (Set at PA2_73.)
LAN cable (straight) or equivalent
On masterr ssiiddee:: 110000 Ω[Ωre]croemcommemndeendd.eSdl.aSvleasviedes:idUen: nUencneesscaersysary
Response time
Operation command: Within 100mmss
Data (parameter) transfer: Within 100mmss
* Some pieces of software do not allow eight data bits and a stop bit simultaneously.
It is recommended to use the RS-232C - RS-422 converter (model: NW0H-CNV) for the use of 1:1
communications between the master and the slave (servo amplifier). Do not use it for multiple unit connection.
PC Loader Communications 13-39
13