Specifications
36 ζ
ZETA6104 Installation Guide
Troubleshooting Serial Communication Problems
General Notes • Power up your computer or terminal BEFORE you power up the ZETA6104.
• Make sure the serial interface is connected as instructed on page 9. Shield the cable to earth
ground at one end only. The maximum RS-232 cable length is 50 feet (15.25 meters).
• RS-232: Handshaking must be disabled. Most software packages allow you to do this. You
can also disable handshaking by jumpering some terminals on the computer's/ terminal's
serial port: connect RTS to CTS (usually pins 4 and 5) and connect DSR to DTR (usually
pins 6 and 20).
• RS-422/485: Make sure the internal DIP switches and jumpers are configured as instructed
on page 6.
Test the Interface 1. Power up the computer or terminal and launch the terminal emulator.
2. Power up the ZETA6104. A power-up message (similar to the following) should be
displayed, followed by a prompt (>):
∗PARKER COMPUMOTOR 6104 – SINGLE AXIS INDEXER/DRIVE
∗RP240 CONNECTED
∗EXPANDED MEMORY OPTION INSTALLED
>
3. Type “TREV” and press the ENTER key. (The TREV command reports the software
revision.) The screen should now look as follows (if not, see Problem/Remedy table
below).
∗PARKER COMPUMOTOR 6104 – SINGLE AXIS INDEXER/DRIVE
∗RP240 CONNECTED
∗EXPANDED MEMORY OPTION INSTALLED
>TREV
∗TREV92-014630-01-4.0 6104
Problem Remedy (based on the possible causes)
No Response • COM port not enabled for 6000 language communication.
If RS-232 connected to COM 1: issue “PORT1” and “DRPCHKØ” commands.
If RS-232 connected to COM 2: issue “PORT2” and “DRPCHKØ” commands.
If RS-422/485 connected to COM 2: issue “PORT2” and “DRPCHKØ” commands.
• RS-232 & RS-422: Echo may be disabled; enable with the ECHO1 command.
• Faulty wiring. See instructions on page 9. RS-422/485: verify internal DIP switch
and jumper settings on page 6. Also check for shorts or opens.
• Is the cable or computer/terminal bad? Here's a test:
1. Disconnect the serial cable from the ZETA6104 end only.
2. Connect the cable's Rx and Tx lines together (this echoes the characters back
to the host).
3. Issue the TREV command. If nothing happens, the cable or computer/terminal
may be faulty.
Garbled Characters • Verify setup: 9600 baud (range is 19200-1200—see
AutoBaud
, page 5),
8 data bits, 1 stop bit, no parity; RS-232 & RS-422: Full duplex; RS-485: Half
duplex (change internal jumper JU6 to position 1).
• RS-422/485: Transmission line not properly terminated. See page 6 for internal
DIP switch and jumper settings. See page 9 for connections and calculating
termination resistors (if not using the internal resistors via internal DIP switches).
• Faulty wiring. See instructions on page 9. RS-422/485: verify internal DIP switch
and jumper settings on page 6. Also check for shorts or opens.
Double Characters • Your terminal emulator is set to half-duplex; set it to full-duplex.