Setpoint Value Channels For Cpci-8004; Pulse Acquisition Channels; Ssi Absolute Encoder - Addi-Data CPCI-8004 Commissioning Manual

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Pin (SUB-D) Name
6 AGND0
7 AGND1
8 AGND2
9 AGND3

5.2.6.4 Setpoint value channels for CPCI-8004

On the CPCI-8004 there are four setpoint value channels available. The settings shown above are applied to
jumpers J1 to J8.
Channel Name
1 J1 / J2
2 J3 / J4
3 J5 / J6
4 J7 / J8
5.2.7

Pulse acquisition channels

The APCI-8001 / APCI-8008 is fitted with up to three pulse acquisition channels, to which various encoder
types, such as linear scales or incremental or absolute encoders can be connected. Two 90° phase-shifted
quadrature signals are processed as input signals, with a maximum pulse frequency of 2.0 MHz (optionally
5 MHz) and TTL sensors. A zero track (index signal) can also be evaluated. The signal levels acquired by
the encoders are electronically quadrupled and processed internally as floating-point numbers with double
accuracy. This means that the value range for the traverse path is virtually unrestricted.
The pulse acquisition of the APCI-8008 is provided with effective line break monitoring.

5.2.7.1 SSI absolute encoder

If SSI absolute encoders are to be used for position feedback, corresponding environment variables must be
set in fwsetup.exe for the respective axis channels (see section on "Environment variables for control system
hardware".
Table: Environment variables for SSI absolute encoders
Variable Value Comment
MT? 2
4
SSIF X
SSIP X
SSIBIN? 1
Function
Reference potential for analog output
Reference potential for analog output
Reference potential for analog output
Reference potential for analog output
Function
1-2 = Stepper / 3-4 = Servo
1-2 = Stepper / 3-4 = Servo
1-2 = Stepper / 3-4 = Servo
1-2 = Stepper / 3-4 = Servo
Servo motor with SSI absolute encoder
Stepper motor with SSI absolute encoder
? is the number of the respective axis channel (starting from 0)
X = Numerical value for SSI frequency in Hz
Permitted values: 100,000 to 4,000,000
Default value: 500000
Note: With bigger cable lengths, the SSI frequency must be reduced in
order to compensate the signal runtimes.
? is the number of the respective axis channel (starting from 0)
X = Numerical value for the number of SSI bits
Permitted values: 2 to 30
Default value:
? is the number of the respective axis channel (starting from 0)
? = Numerical value for the number of SSI bits
The binary code at the SSI data word is selected with a nonzero value.
Default: Gray code.
? is the number of the respective axis channel (starting from 0)
26 (25 bits + 1 extra bit)
CM / C M
OMMISSIONING
Pin at P5
or X6
(FB)
2
4
6
8
ANUAL