Yokogawa Data Acquisition with PID Control CX2000 User Manual
Page 84
3-4
IM 04L31A01-17E
XON-XON
• Data Transmission Control
Software handshaking is performed between the CX and the PC. When an “X-
OFF” code is received while sending data to the PC, the CX stops the data
transmission. When the CX receives the next “X-ON” code, the CX resumes the
data transmission. The CS signal received from the PC is ignored.
• Data Reception Control
Software handshaking is performed between the CX and the PC. When the free
area of the received buffer decreases to 1537 bytes, the CX sends an “X-OFF”
code. When the free area increases to 511 bytes, the CX sends an “X-ON” code.
RS = True (fixed).
XON-RS
• Data Transmission Control
Software handshaking is performed between the CX and the PC. When an “X-
OFF” code is received while sending data to the PC, the CX stops the data
transmission. When the CX receives the next “X-ON” code, the CX resumes the
data transmission. The CS signal received from the PC is ignored.
• Data Reception Control
Hardware handshaking is performed between the CX and the PC. When the free
area of the received buffer decreases to 1537 bytes, the CX sets “RS=False.”
When the free area increases to 511 bytes, the CX sets “RS=True.”
CS-RS
• Data Transmission Control
Hardware handshaking is performed between the CX and the PC. When the CS
signal becomes False while sending data to the PC, the CX stops the data
transmission. When the CS signal becomes True, the CX resumes the data
transmission. The “X-OFF” and “X-ON” signals are treated as data.
• Data Reception Control
Hardware handshaking is performed between the CX and the PC. When the free
area of the received buffer decreases to 1537 bytes, the CX sets “RS=False.”
When the free area increases to 511 bytes, the CX sets “RS=True.”
Note
• The PC program must be designed so that the received buffers of both the CX and the PC do
not become full.
• If you select XON-XON, send the data in ASCII format.
3.2 Connector Pin Arrangement and Signal Names, Connection Procedure, and Handshaking Methods