■2. Precautions when preparing a cable
(1) Cable length
The maximum length of the RS-422 cable differs according to the specifications of the SHARP PLC.
For details, refer to the following manual.
➠
SHARP PLC user's Manual
(2) GOT side connector
For the GOT side connector, refer to the following.
➠
1.4.1 GOT connector specifications
(3) SHARP PLC side connector
Use the connector compatible with the SHARP PLC side module.
For details, refer to the SHARP PLC user's manual.
■3. Connecting terminating resistors
(1) GOT side
(a)
For GT27, GT25(Except GT2505-V), GT23
Set the terminating resistor setting switch of the GOT main unit to "Disable".
(b)
For GT2505-V
Set the terminating resistor selector to "330Ω".
For the procedure to set the terminating resistor, refer to the following.
➠
1.4.3 Terminating resistors of GOT
(2) SHARP PLC side
Connect the terminating resistor on the SHARP PLC side when connecting a GOT to a SHARP PLC.
The PLC CPUs and the modules on the PLC CPU side requiring a terminating resistor are shown below.
(a)
JW-22CU
Turn "ON" the terminating resistor setting switch (SW1) on the back of JW-22CU to validate the terminating
resistor.
(b)
JW-70CUH and JW-100CUH
Connect the pin 6 (terminating resistor) of the communication port connection connector with the pin 13 (RXD)
only at the terminal station to validate the terminating resistor.
(c)
JW-21CM, JW-10CM and ZW-10CM
Turn "ON" the terminator switch (SW7) on the front panel only at the terminal station to validate the terminating
resistor.
9.3 Connection Diagram
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