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CR-AD3 Analog Card Description
Functional Overview
The expansion card is according to the actual
needs of users; is mainly used to increase host’s
extra functions, so as to achieve the user’s
personal needs.
CR-AD3 analog card is used for CR-PGM Ⅲ
programmable control host’s function expansion;
it allows CR-PGM Ⅲ host to increase double
power output function, and can read actual
voltage value from the port.
Application Characteristics
◆ Input: 3 high impedance input;
◆ Output: 3 DC output;
◆ D . A, a . D conversion: A/D and D/A converter
functions can be used for sampling and control;
10 AD sampling precision, 12 output precision;
◆ Input voltage range: 0 V to +12 V;
◆ Output voltage range: -12 V to +12 V;
◆ Output voltage can be regulated by software;
◆ Maximum acceptable voltage of Input is +36
volts dc;
◆ The maximum current of each output is 5mA.
External Reference Input
◆ The Max input sampling voltage value is +12
volts DC;
◆ The over voltage is +36 volts DC;
Operation Methods
◆ Output voltage control method (D/A converter);
CR-PGM Ⅲ host send certain roads and certain
volts voltage to analog card, analog card receive
the instruction to make voltage output.
◆ Reads the input voltage ( A/D converter )
CR-PGM Ⅲhost send instruction of reading
certain road to analog card, after receiving the
instruction, analog card will feedback the actual
voltage to the CR-PGM Ⅲhost.
◆Following are the programming function
description of CR-PGM Ⅲ when use analog card
SEND_QACAR
Void SEND_QACAR (String dev,int channel)
Function: send the request of analog card voltage
value, after sending the request, will trigger the
analog card DataEVENT events, where they can
get the voltage value, specific examples to see
the BYTES_TO_INT Parameters of other
functions.
dev - :Analog device
channel - :Equipment channel number
Example:
Acar_m = M:8:ACAR; // Define host board No. 8
analog card
SEND_QACAR (Acar_m,1); // read the first
voltage value of Acar_m
BYTES_TO_INT
Int BYTES_TO_INT (byte[] b)
Function: process the first 4 bytes of byte array as
an int number, if B is less than 4 bytes, convert
according to its real bytes, big endian mode.
Returns:
Return to the converted int number.
Example: analog card voltage returns, the actual
voltage of analog card = return voltage (mV)
DATA_EVENT(mcar,2)
{ONDATA()
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CR-AD3 Analog Card Description
{double voltage = BYTES_TO_INT(DATA.Data) //
When using SEND_QACAR transmit request,
here
the
trigger.
SEND_COM(COM,1,DOUBLE_TO_STRING(volt
age));
}
SEND_ACAR
void SEND_ACAR(String dev,int channel,int val)
Function: control the voltage output of analog
card
Parameters:
dev - : Analog device
channel - :Equipment channel number
val - :value of Analog ( Note: according to specific
external equipment. ) ( general values range from
double -12 V to 12 V )
Example:
acar_L = L:7:ACAR:192.168.1.20; // Define ACAR
equipment whose CRLINK ( CAN ) number is 7
SEND_ACAR( acar_L,1,-12);// to send analog
value -12 to the first way of lilt_L, namely setting
analog card output -12 V.
CREATOR CHINA 2012-11 WWW.CREATOR1997.COM
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