B8961 and B8962 User Manual
92
Troubleshooting Serial Communication Problems
If communications between computer and Smart D ri ve are unsuccessful, one or more
of the fo l l owing pro c e d u res will usually solve the pro bl e m :
1.
Test your terminal or terminal emulation software.Unhook the drive and trans-
mit a character.An echoed character should not be received.If an echoed char-
acter is received, you are in half duplex mode. Jumper your host’s TX and RX
connections,and transmit another character. If you do not receive the echoed
character, consult the manufacturer of the host’s serial interface for proper pin-
outs.
2.
Host transmit (TX) must be connected to receive (RX) of the drive unit,and
receive (RX) of the host must be connected to transmit (TX) of the drive.If
communication fails,try switching connections on either the host or the drive.
3.
Many serial ports require handshaking. Jumper RTS to CTS,and DSR to DTR
(see table).
4.
Configure the host to the identical baud rate, number of data bits, number of
stop bits,and parity.
5.
Receiving double characters (XX) when entering single characters (X),indi-
cates your computer is set to the half duplex mode.Change to the full duplex
mode.
6.
Check your grounds.Use DC common or signal ground as your reference.Do
not use earth ground or shield.
7.
Check your cable length.If any cable is over 50 ft.long, you should be using a
line driver, optical coupler, or shield.Shields must be connected to earth
ground at one end only.
Daisy Chaining SmartDrives
Your SmartDrive also supports daisy chaining.The unit address (range 1-99) can be
set via the keypad,through Application Developer, or with a terminal program
using the Unit Number (UN) command,or the entire chain may be addressed at
once using the Auto-Address (AA) command.
Jumpers
9 pin D
25 pin D
RTS to CTS
7 to 8
4 to 5
DSR to DTR
4 to 6
6 to 20
Содержание B8961
Страница 111: ...109 Chapter 7 Programming with Serial Communication...
Страница 132: ...B8961 and B8962 User Manual 130...
Страница 136: ...B8961 and B8962 User Manual 134 B8961 and B8962 Hardware Connections...
Страница 137: ...135 Chapter 8 Hardware Reference B8961 and B8962 Input and Output Schematics...
Страница 138: ...B8961 and B8962 User Manual 136 Connecting IDC Limit Switches to the B8961 2...
Страница 156: ...B8961 and B8962 User Manual 154...