2.2Setting Parameters According to Host Controller
— 2-13 —
2.2.2 Position References
Input a position reference by using the following input signal “reference pulse input.” Since
there are several specifications for input signal, select reference input for the system to be
created.
Pulse Input Reference
Inputs a move reference by pulse input.
Position reference can correspond to the
following three types of output form:
• Line driver output
• +12V Open collector output
• +5V Open collector output
Connection Example 1: Line Driver Output
Line Driver Used:
SN75174 manufactured by
Texas Instruments Inc., or
MC3487 or equivalent.
Connection Example 2: Open Collector Output
Sets the value of limiting re-
sistor R1 so that input cur-
rent i falls within the follow-
ing range:
Input Current i: 7 to 15 mA
Examples:
• When Vcc is 12 V,
R1 = 1 kΩ
• When Vcc is 5 V,
R1 = 180 Ω
2
Positions
Reference
sign input
Error counter
clear input
Reference
pulse input
PULS
/PULS
CN1-14
CN1-15
SIGN
/SIGN
CN1-16
CN1-17
CLR
/CLR
CN1-18
CN1-19
Servopack
: Twisted-pair cable.
Photocoupler
Line driver
PULS
/PULS
Servopack
150Ω
CLR
/CLR
SIGN
/SIGN
Host controller
: Twisted-pair cable.
CN1-14
CN1-15
CN1-16
CN1-17
CN1-18
CN1-19
CLR
Vcc
PULS
/PULS
Servopack
Photocoupler
150Ω
/CLR
SIGN
/SIGN
Host controller
R1
i
Tr1
R1
R1
: Twisted-pair cable.
CN1-14
CN1-15
CN1-16
CN1-17
CN1-18
CN1-19
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