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31
I/O Allocation Table
The X, Y contact number for I/O is determined by the installation
location of the SCU and the number of points of other I/O units.
The I/O numbers shown below are applied when the SCU is installed
in slot 0 of base backplane.
For I/O of SCU, 16 points from X0 to XF will be allocated for input and
16 points from Y10 to Y1F will be allocated for output.
The meaning of each I/O contact is shown in the table below and the
handshake processing will be based on this status.
Input signal
Event
N-series
N-plus
series
X0
R0.0
For CH1 sending
X0 (R0.0) turns on when the SCU receives sending data. *1
X1
R0.1
For CH1 receiving
X1 (R0.1) turns on when normal data is input from devices
connected to CH1. *1
X2
R0.2
For CH2 sending
X2 (R0.2) turns on when the SCU receives sending data. *1
X3
R0.3
For CH2 receiving
X3 (R0.3) turns on when normal data is input from devices
connected to CH2. *1
X4
R0.4
For CH1 receiving data
X4 (R0.4) turns on only when framing error occurs in received data.
X5
R0.5
For CH1 receiving data
X5 (R0.5) turns on only when parity error occurs in received data.
X6
R0.6
For CH1 receiving data
X6 (R0.6) turns on when the received data buffer is full.
X7
R0.7
For CH1 receiving data
X7 (R0.7) turns on when message length error occurs in received
data.
X8
R0.8
For CH1 sending data
X8 (R0.8) turns on when message length error occurs in sending
data.
X9
R0.9
For CH2 receiving data
X9 (R0.9) turns on only when framing error occurs in received data.
XA
R0.10
For CH2 receiving data
XA (R0.10) turns on only when parity error occurs in received data.
XB
R0.11
For CH2 receiving data
XB (R0.11) turns on when the received data buffer is full.
XC
R0.12
For CH2 receiving data
XC (R0.12) turns on when message length error occurs in received
data.
XD
R0.13
For CH2 sending data
XD (R0.13) turns on when message length error occurs in sending
data.
XE
R0.14
For SCU operation ready indication
XE (R0.14) turns on when SCU initialization completes.
XF
R0.15
Unused
See
"Timing for Sending and Receiving" on page 25
for detailed information.
NOTE
Содержание Samsung NX-SCU
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