Panasonic FP2 Series, Руководство пользователя

Страница: 82 / 102

FP2 Serial Data Unit
Specifications
7 − 6
7.3 Table of I/O Contacts
7.3 Table of I/O Contacts
I/O allocation
Functions such as handshaking and error signals with the CPU unit are handled by the
X and Y contacts allocated to the serial data unit. The I/O of 16 X and 16 Y points are
allocated to the serial data unit. The I/O numbers change depending on the slot position
at which the serial data unit is installed and the I/O of other unit.
Input number table
Input signal Name Contents
X0 COM.1 Sending completed
flag
Goes on when sending has been completed.
Goes off when sent buffer is cleared.
XI Reception completed
flag
Goes on when data has been successfully received.
Goes off when received buffer is cleared.
X2 COM.2 Sending completed
flag
Goes on when sending has been completed.
Goes off when sent buffer is cleared.
X3 Reception completed
flag
Goes on when data has been successfully received.
Goes off when received buffer is cleared.
X4 COM.1
(*
Note 1)
Framing error Goes on if the data length or stop bit of the received data
is different from the setting.
X5
(
Note 1)
Parity error Goes on if the parity of the received data is different from
the setting.
X6 Buffer full error Goes on if the received buffer is full.
X7 Received message
length error
Goes on if the frame length of the received data exceeds
500 bytes.
X8 Sent message length
error
Goes on if the frame length of the sent data exceeds 500
bytes.
X9 COM.2
(*
Note 1)
Framing error Goes on if the data length or stop bit of the received data
is different from the setting.
XA
(
Note 1)
Parity error Goes on if the parity of the received data is different from
the setting.
XB Buffer full error Goes on if the received buffer is full.
XC Received message
length error
Goes on if the frame length of the received data exceeds
500 bytes.
XD Sent message length
error
Goes on if the frame length of the sent data exceeds 500
bytes.
XE Software reset completed flag
(
*
Note 2)
This is normally on. It goes off while a software reset is in
progress, and goes on at the same time that the software
reset is completed. (This is used when using the shared
memory to change the communication format.)
XF Not used ————
Notes
1) Error flags go off when data is successfully received, or when
a software reset is carried out.
2) A software reset takes approximately 100 ms, from the time
when the software reset signal Y1D goes on to the point where
the reset is completed.