Related FAQs:
VIDEO: express basics training: GV6 or GT6 drive controllers
VIDEO: express basics training: GV6K or GT6K drive controllers
Each intelligence level of the Gemini family has different RS232 protocol abilites.
The GV & GT are Binary-only on units. They do not communicate via ASCII like most of Parker's other controllers. They require a translator which is done by the Communications Server (Com6srvr) that Motion Planner uses. The Com6srvr is an ActiveX component that may be used in other software like VB, VC++, LabView, etc.
For notes on use the communications server in binary see this related FAQ:
Sending commands to Gemini from 6K via RS232
The GV6 & GT6 originally were released also with just Binary communication. The Com6srvr was also required for translation. It was the same translation as was needed for the GV/GT. An ASCII translator card was then added to the hardware of the GV6/GT6. Units with serial numbers of 02061700000 and higher have both Binary and ASCII capability.
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Check your cable to make sure it has pinouts for a Null Modem RS232 cable (if you are using RS232). These pinouts are... Parker's part number is 71-016939-10 for a CE rated RS232 cable and is a 9-pin female connector on both ends.
9-Pin PC Connection | Gemini |
|---|---|
Pin 2 (Rx) | Pin 3 (Tx) |
Pin 3 (Tx) | Pin 2 (Rx) |
Pin 5 (GND) | Pin 5 (GND) |
Is the computer power cord and Gemini's power cord plugged into the same AC outlet? In some cases, a ground potential between two AC outlets has caused an RS232 port failure. Plug both into the same AC outlet. Try communicating with the other COM port, if the device has one. If you are using a laptop, unplug the AC power adapter.
If you are using Parker's RS232 cable, make sure the end labeled with the "No Connect" sticker is plugged into the Gemini instead of the computer. The cable should work both ways, but voltage potentials and noise can cause intermittent communication problems.
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