Fuji Electric POD UG Series, Руководство пользователя

Страница: 44 / 75

5
5. Universal Serial Communications
5-5
C
on
ne
ctio
ns
5. Universal Serial Communications
•
A general purpose computer or an ASCII unit of the PLC (master station) controls the Simple POD
(slave station) using dedicated commands.
•
The Simple POD internal user memory addresses ($u) must be used for memory allocation for
switch, lamp or data display parts.
When the master station specifies a screen number, data is written to the internal memory address
($u) allocated for the screen. If the screen is switched internally, the new screen number is read
and is written to the internal memory address ($u) allocated for the screen.
•
For 1 : 1 connection, the Simple POD can send an interrupt to the master station through switch
activation, write command from the keypad, and screen change.
•
Use CN1 of the Simple POD for connection with a general-purpose computer. Either signal level
RS-232C or RS-422 (RS-485) can be selected.
•
In addition to 1 : 1 connection, 1 : n connection is available between the general-purpose
computer and the Simple POD via RS-422.
(A maximum of 32 Simple POD units can be connected.)
For 1 : n connection, interrupts cannot be used.
•
For more information, refer to the User’s Manual <PLC Connection> (FEH380).
RESET
disc
CN1
SYSTEM
F2
F3
F4
F5
F1
POWER
RS-232C or RS-422 (RS-485)
Simple POD
Write
General-purpose computer
Dedicated commands
Interrupt
Read
CN1 CN1 CN1 CN1
SYSTEM
F2
F3
F4
F5
F1
POWER
SYSTEM
F2
F3
F4
F5
F1
POWER
SYSTEM
F2
F3
F4
F5
F1
POWER
SYSTEM
F2
F3
F4
F5
F1
POWER
RS-422 (RS-485) connection
Simple POD No. 1
General-purpose computer
Simple POD No. 2 Simple POD No. 3 Simple POD No. “n” (n = 1 to 32)