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The tape might not be tight enough under the read head.
Maybe try putting some drag on the supply reel with a finger??

Should have 5 tapes:
Exec 1
Exec 2
Patch tape
MTB/MSC tape
Parameter tape
Load exec 1, press STP, RST, IPL, RUN switches on the PRC & MMU
When 'Completed' shows on screen, rewind and load exec...

The mech jog function may be disabled in the application.
Send a copy of the machine data backup file to:
[email protected]
Might be able to edit it and reactivate the feature...

Try 8 data, 1 stop bit, no parity on the control
7 data, 1 stop, even parity on the PC.
Hardware handshake on both (L1 protocol on the 850, RTS/CTS on the PC)
Set system comm data #110 on the 850...

Pull the realtime board out, plug in a video card, monitor, power supply, and keyboard. Boot it up like a pc, get into the CMOS tables and snap a few photos of those setup screens.

You might want to check the backplane configuration in service toolbox. Since it has a RIPT board it should be set up as a version 3 backplane. The on-screen instructions tell how to change it if...

Press and hold the 'Ctrl' button on the pendant, then press 'Escape'.
This puts the pendant in an interactive test mode. Press any button - the LCD screen will indicate if the button is working -...

Make sure the subnet mask is the same for both too (shown just below the IP address).

IF you still have the machine, try killing the AC power going to the worklight on the machine - they are known to be huge noise generators even if the bulb is out.

SF58 is the controls way of...

I'd be interested too. Most A2100 run on a version of WinNT 3.5 or 4.0 which isn't supposed to support USB...
The A2100Di controls do support it - they use Win2K as the OS.

You might try updating the diagnostic s/w in the control before ordering any parts. Contact the tech support group at Siemens - they can e-mail it to you. Hot Line#800 879 8079

You might want to check the -5vdc test point on the DIMP board - that's critical to the serial channel operation.
-5vdc = good
0vdc = blown v-reg chip on the motherboard
-12vdc = blown v-reg chip...