Rs-485 Communications - Parker Gemini GT6 Series Hardware Installation Manual

Units with RS-232 disabled (EØ) will not respond to any commands, except E1;
however, characters are still echoed to the next device in the daisy chain.
Commands:
3_E0
DRES25000
3_E1
3_DRES4000
Verify communication to all units by using the techniques described above.
Step 3
Now that you have verified that the daisy chain is set up properly, you can use the
various Pocket Motion Planner and Motion Planner tools to configure and monitor
all units on the daisy chain.

RS-485 Communications

Pin Out for 4-Wire RS-485 Communications:
Pin Description
1
4
5
7
8
•
•
•
•
•
•
R S - 2 3 2 / 4 8 5
c o n n e c t o r
RS-485 Multi-drop Connections
; Disable RS-232 on unit #3
; Set resolution to 25000 on all other units
; Enable RS-232 on unit #3
; Set resolution to 4000 on unit #3
Rx+ (also called RD B)
Tx+ (also called TD B)
GND (logic ground)
Rx- (also called RD A)
Tx- (also called TD A)
Maximum RS-485 cable length is 4000 feet (1220 meters)
To establish unique addresses for multi-drop units, use the ADDR command.
Keep wires as short as possible. Termination resistors may be required on long
cable runs.
Connect RS-485 cables before applying power to the drive.
Recommended cable: Belden 9842
Refer to the diagram below for connection information.
U n i t # 1
P i n 1 ( R x + )
P i n 7 ( R x - )
P i n 4 ( T x + )
P i n 8 ( T x - )
P i n 5 ( G N D )
U n i t # 2
P i n 1 ( R x + )
P i n 7 ( R x - )
P i n 4 ( T x + )
P i n 8 ( T x - )
P i n 5 ( G N D )
U n i t # 3
P i n 1 ( R x + )
P i n 7 ( R x - )
P i n 4 ( T x + )
P i n 8 ( T x - )
P i n 5 ( G N D )
U n i t # 3 1
P i n 1 ( R x + )
P i n 7 ( R x - )
P i n 4 ( T x + )
P i n 8 ( T x - )
P i n 5 ( G N D )
G r o u n d
T x +
T x -
R x +
R x -
S h i e l d
L o n g c a b l e r u n s m a y
r e q u i r e t e r m i n a t i o n r e s i s t o r s
Chapter 4 – Special Features
M a s t e r U n i t
+ 5 V D C
1 2 0 Ω
1 2 0 Ω
37