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174 • Appendices DMC-3425
J1 RS232 Main port: DB-9 Pin Male:
PC Galil
1 DCD 1 RTS
2 RX 2 TX
3 TX 3 RX
4 DTR 4 CTS
5 GND 5 GND
6 DSR 6 RTS
7 RTS 7 CTS
8 CTS 8 RTS
9 RI 9 --
Pin-Out Description
OUTPUTS DESCRIPTION
Analog Motor
Command
+/- 10 Volt range signal for driving amplifier. In servo mode, motor
command output is updated at the controller sample rate. In the motor off
mode, this output is held at the OF command level.
Amp Enable Signal to disable and enable an amplifier. Amp Enable goes low on Abort
and OE1.
Error The signal goes low when the position error on any axis exceeds the value
specified by the error limit command, ER.
Output 1-Output 3
These 3 TTL outputs are uncommitted and may be designated by the user to
toggle relays and trigger external events. The output lines are toggled by Set
Bit, SB, and Clear Bit, CB, instructions. The OP instruction is used to define
the state of all the bits of the Output port.
INPUTS DESCRIPTION
Encoder, A+, B+ Position feedback from incremental encoder with two channels in
quadrature, CHA and CHB. The encoder may be analog or TTL. Any
resolution encoder may be used as long as the maximum frequency does not
exceed 12,000,000 quadrature states/sec. The controller performs quadrature
decoding of the encoder signals resulting in a resolution of quadrature counts
(4 x encoder cycles). Note: Encoders that produce outputs in the format of
pulses and direction may also be used by inputting the pulses into CHA and
direction into Channel B and using the CE command to configure this mode.
A and B axis Encoder
Index, I+
Once-Per-Revolution encoder pulse. Used in Homing sequence or Find
Index command to define home on an encoder index.
A and B axis Encoder,
A-, B-, I-
Differential inputs from encoder. May be input along with CHA, CHB for
noise immunity of encoder signals. The CHA- and CHB- inputs are
optional.