
3. ELECTRICAL INTERFACE B-63322EN-1/01
-12-
3) Signal description
Signal
name
RS-232-C
circuit
number
Input/
output
Description
SD 103 Output Transmission data
RD 104 Input Reception data
See “3.1” for the bit configuration.
RS 105 Output Transmission request
It is used to inform whether the remote buffer is ready to receive data or not.
When the TR signal is on and this signal is on, the remote buffer is ready to
receive data.
CS 106 Input Clear to send
It is used to know the busy status at the host computer. When the RR signal
is on and this signal is on, the host computer is regarded as being ready to
receive data.
TR
(ER)
108.2 Output Terminal Ready
When this signal is on, it is considered that the operation of remote buffer
has been completed.
In general, it is connected to the ER signal at the host computer. If it is
turned off during transmission of data, an alarm results. If this signal is not
used, always connect this to the ER signal at the CNC side.
RR
(DR)
109 Input Receiver Ready
When this signal is on, it indicates that the host computer is ready to transmit
data to the remote buffer. If this signal is not used, always connect it to the
TR signal at the remote buffer side.
TT 113 Output Transmission timing
Transmission clock transmission terminal at the remote buffer side. When
38400 baud or more is used, always connect it to the RT signal at the host
computer side.
RT 115 Input Reception timing
Reception clock input terminal at the remote buffer side. When 38400 baud
or more is used, always connect it to the TT signal at the host computer side.
SG 102 Grounding for signal
FG 101 Grounding for protection
NOTE
The signal turn on/off according to the following:
A < B A > B
Function OFF ON
Signal Condition Marking Spacing
Driver
Receiver
A
A
B
B