ATech Machine ZETA-02 A Guía de instalación Pagina 14
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8 z ZETA6104 Installation Guide
Serial Communication
Rx
Tx
GND
SHLD
COM 1 COM 2
+5V
GND
Rx
Tx
SHLD
Rx+
RxÐ
Tx+
TxÐ
GND
Rx
Tx
GND
SHLD
RS-232C Connections
25-Pin COM Port:9-Pin COM Port:
Serial Port Connection
Tx
Rx
GND
RS-232C Daisy-Chain Connections*
Unit 0
Rx
Tx
GND
SHLD
Unit 1
Rx
Tx
GND
SHLD
Unit 2
Tx
Rx
GND
Daisy Chain to a Computer or Terminal
Rx
Tx
GND
SHLD
Unit 0
Rx
Tx
GND
SHLD
Unit 1
Rx
Tx
GND
SHLD
Unit 2
Stand-Alone Daisy Chain
Be sure to set unique devices addresses for each unit.
To set the address, use the DIP switch (see page 4),
or use the ADDR command (see 6000 Series ProgrammerÕs Guide).
*
NOTE: Maximum RS-232C cable length is 50 feet (15.25 meters)
Rx
Tx
GND
Pin 2 (Rx)
Pin 3 (Tx)
Pin 5 (GND)
Rx
Tx
GND
Pin 2 (Tx)
Pin 3 (Rx)
Pin 7 (GND)
Rx+
RxÐ
Tx+
TxÐ
GND
COM 2
+5V
GND
Rx
Tx
SHLD
Rx+
RxÐ
Tx+
TxÐ
GND
COM 2
+5V
GND
Rx
Tx
SHLD
Rx+
RxÐ
Tx+
TxÐ
GND
COM 2
+5V
GND
Rx
Tx
SHLD
Rx+
RxÐ
Tx+
TxÐ
GND
COM 2
+5V
GND
Rx
Tx
SHLD
Rc
Vcc
Rd
Vb Rb
Balanced Cable.
Ra
Step 1 Calculate the equivalent resistance (Req)
*
of Rc / / Rb:
Rc / / Rb = 120W / / 120W = 60W
Step 2 Calculate the pull-up and pull-down resistor values knowing that
the FAILSAFE bias is 200mV and Vcc = 5V:
Vb = Vcc (Req / (Ra + Req + Rd))
solving for R' (defined as Ra + Rd)
R' = ((Req) Vcc / Vb) - Req
R' = ((60W) 5V / 0.2V) - 60W = 1440W
Since Ra and Rd are equal, Ra = Rd = 1440W / 2 = 720W
Step 3 Recalculate the equivalent resistance of RC / / (Ra + Rd):
Rc / / (Ra + Rd) = 120W / / (720W + 720W) = 110.77W
Since the equivalent resistance is close (within 10%) to the characteristic
impedance of the cable (Zo), no further adjustment of resistor values is
required.
Example
Assumptions: The cable's characteristic impedance (Zo) = 120W.
Rc and Rb are equal and are selected to match Zo
(Rc = Rb = Zo = 120W).
For further information,
consult a communications
interface reference.
* Actual calculation
for equivalent resistance
(e.g., R
1
/ / R
2
):
R
1
R
2
(R
1
+ R
2
)
RS-485 Connections (4-wire interface, plus ground)
Master
UnitTx+
RS-485 Configuration
Before you can use RS-485
communication, you must re-
configure the COM 2 port by
setting internal jumpers JU1-JU6
to position 1. 4-wire is default
(to use 2-wire, set JU7 to
position 1).
Refer to page 5 for instructions.
TxÐ
Rx+
RxÐ
120 W
120 W
Shield
Unit #1
Unit #2
Unit #3
Unit #31
DIP switch selects internal resistor values (ON selects the resistor).
Use these resistors only for the last unit (or for a single unit).
If your application requires terminating resistors other than 120W,
and/or bias resistors other than 681W, then make sure the internal
DIP switches are set to OFF and connect your own external resistors.
To calculate resistor values:
5VDC
120 W
681W
Calculating Resistor Values
681W
12
34
O
N
120 W
+5VDC
NOTE: Maximum RS-485 cable length is 4000 feet (1220 meters)
Ground
- Compumotor 1
- User Information 2
- Change Summary 3
- THIS GUIDE 5
- LVD Installation Guidelines 6
- General Specifications 9
- Pre-installation Adjustments 10
- RS-232C Users 11
- Mounting the ZETA6104 12
- Electrical Connections 13
- Serial Communication 14
- Motor Connector 15
- WARNING: 15
- O & R Motor Curves 16
- Zeta Motor Curves 16
- I/O Connector 17
- LIMITS Connector 17
- ENCODER Connector 17
- ZETA6104 unconnected 18
- Trigger Inputs 19
- PIN OUTS & SPECIFICATIONS 20
- Connection 22
- ZETA6104 23
- Lengthening I/O Cables 25
- WARNING 26
- COM 2 (PORT2) configured 27
- 123456789101112 28
- column. Vary the speed 29
- WARNINGS 30
- Coupling the Motor 31
- Configuring Active Damping 32
- Ð DO NOT 33
- In most applications 36
- Chapter 1. Installation 31 37
- WhatÕs Next? 38
- Troubleshooting 39
- Troubleshooting Basics 40
- Chapter 2. Troubleshooting 35 41
- Product Return Procedure 43
- Appendix A 45
- Damping in the ZETA6104 46
- Appendix B 49
- Terminal Connections 50
- Direction of Motor Rotation 51
- Setting Motor Current 51
- Appendix C 53
- Mechanical 54
- Servicing the ZETA6104 54
- Thermal Safety 54
- Sonic Pressure 54
- Appendix D 55
- Installation 56
- Motor Cables 57
- Motor Feedback Cables 57
- Step Motors 57
- Programmable 58
- I/O Cable 58
- ZETA6104 Indexer/Drive 63
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