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75
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74
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Communication
• Transmission procedure
$P/$S: Data writing/Parameter writing command
(1) Host
→
Amplifier (Data writing)
SOH
STX $
P
*
*
*
*
*
*
*
*
ETX BCC
Amplifier ID Host ID
Command
Data number
(parameter address)
Data
(parameter value)
(2) Amplifier
→
Host (result response)
SOH
ACK
Host ID
Amplifier ID
• Answers NAK when requested data number (parameter address) or data value
(parameter value) is abnormal. Shows that parameter was properly set only when
ACK is answered from the amplifier.
• No result is answered from the amplifier when amplifier ID is 80h (128).
$R: Data reading/Parameter reading command
(1) Host
→
Amplifier (Data reading request)
SOH
STX $
R
*
*
*
*
0
0
0
0 ETX BCC
Amplifier ID Host ID
Command
Data number
(parameter address)
Data
(parameter value)
• Set data ‘0000’ when executing data reading command.
• When amplifier ID is 80h (128), data reading/parameter reading command is ignored.
(2) Amplifier
→
Host (Result response)
SOH
ACK
Host ID
Amplifier ID
(3) Host
→
Amplifier (Request for sending)
SOH
ENQ
Amplifier ID Host ID
(4) Amplifier
→
Host (Response of data)
SOH
STX #
R
*
*
*
*
*
*
*
*
ETX BCC
Host ID
Amplifier ID
Command
Data number
(parameter address)
Reading data
(parameter value)
• Response data when amplifier is powered on is initial request response.
• When requested data number (parameter address) is abnormal, ‘0000’ as reading
data (parameter address) is answered.
• Check whether the data No. (parameter address) is correct, then use the reading data.
(5) Host
→
Amplifier (Result response)
SOH
ACK
Amplifier ID Host ID
(6) Amplifier
→
Host (Communication completion response)
SOH
EOT
Host ID
Amplifier ID
ENQ: Request for sending
When request for sending is sent to the amplifier, response data changes depending on
the status of amplifier. Response data is returned in the priority order below:
1 When amplifier is powered on
Initial request response is answered.
2 When receiving data reading /
parameter reading
Refer to data reading command processing.
3 When the status of amplifier changes Data update request is answered.
4 Other cases than the above
Communication completion response is answered.
• Initial request response is answered to the initial data request for sending after the am-
plifier is powered on.
• When the amplifier ID is 80h (128), request for sending to the amplifier is ignored.
1. When the amplifier is powered on
(1) Host
→
Amplifier (Request for sending)
SOH
ENQ
Amplifier ID Host ID
(2) Amplifier
→
Host (Request of data)
SOH
STX #
I
9
9
9
9
0
0
0
0 ETX BCC
Host ID
Amplifier ID
Command
Data number
Reading data
(3) Host
→
Amplifier (Response of result)
SOH
ACK
Amplifier ID Host ID
(4) Amplifier
→
Host (Communication completion response)
SOH
EOT
Host ID
Amplifier ID
• When initial response is confirmed, write parameters as necessary.
2. When receiving data reading / parameter reading