PCB Piezotronics 482M179, Инструкция по установке и эксплуатации, Страница: 26 / 37

MODELS 483C30, 483C50, 482M179 AND 483M217 GENERAL OPERATION MANUAL
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Likewise, a global Query command will be responded to by the channel 1-4 board but will be ignored by the
channel 5-8 board. However, in order to facilitate efficient communications with the second board, the concept
of a second unit address was introduced. A user’s control application can direct global channel setting queries
to the second board of a unit by addressing the query to the secondary unit address of the unit. This secondary
unit address is defined to be the normal unit address plus 128 (i.e. if a units address is 1 then the 2
nd
board’s
address would be 129)
3-8. Commands
GAIN
SET GAIN: This command sets the programmable gain of a channel. The gain may be set to any setting within the 0.1
to 200 range.
Setting:
The amplifier gain can be set directly by sending a Gain command:
1:0:GAIN=100.2\r\n (unit 1,all channels gain set to 100.2)
When a channels gain is set directly the unit will adjust the FSI parameter of the gain equation using the
following equation; FSI = (((FSO*1000)/Gain)/Sens) to ensure it remains valid.
Setting Response: 1:GAIN:ok
Query:
The Gain query returns all of the parameters used to determine it in a single response
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:=Gain:SENS:FSO:FSI;
Query: 1:5:GAIN?
Response: 1:GAIN:5= 5.0: 10.0: 10.0: 200.0;
Global Gain Query: 1:0:GAIN?
Global Gain Response: 1:GAIN:1= 5.0: 10.0: 10.0: 200.0;2= 5.0: 10.0: 10.0: 200.0;3= 5.0:
10.0: 10.0: 200.0;4= 5.0: 10.0: 10.0: 200.0;
SENS
The SENS command provides a mechanism to have the transducer Sensitivity influence the Gain setting of the channel.
Channel Gain is calculated using the equation;
Gain = FSO*1000/(FSI*SENS). If a Sensitivity is entered that caused the gain to exceed the amplifiers capability the
FSI component will be adjusted to keep the equation valid.
Setting:
1:0:SENS=20.2\r\n (unit 1,all channels transducer sensitivity set to 20.2)
Setting Response: 1:SENS:ok
Query:
The Sens query returns the channels transducer sensitivity
Query Format: Unit#:Ch#:CMD?
Response format: Unit#:Cmd:Ch#:= SENS;
Query: 1:1:SENS?
Response: 1:SENS:1= 6.0;