Fuji Electric Monitouch S8 series, Connection Manual

Page: 350 / 406

23.4 Standard Type Protocol 23-15
23.4.2 Protocol Contents
Transmission Control Code
The transmission control codes are shown in the table below.
Port Number
Port numbers can be set for connection mode “1 : n”.
They are used so that the host computer can identify each S8 series for access.
The data range is from 00H to 1FH (0 to 31) and is converted into a two-digit ASCII code (HEX) before use. Set port numbers
of the S8 series at [Local Port No.] in the [Communication Setting] tab window.
Global port number (FFH)
When the global port number [FFH] is set, commands are send to all S8 series units at one time.
Commands for which global port numbers are active are shown below. If commands other than these are used, a command
error will occur.
Responses to global port numbers are not transmitted to the host. However, responses are written in write area n + 8.
Command
Available commands are shown below. The details on commands are described on pages shown at “Refer to:”.
Signal Name Code (Hexadecimal) Contents
STX 02H Start of transmission block
ETX 03H End of transmission block
ENQ 05H Interrupt
ACK 06H Positive acknowledge
CR 0DH Carriage return
DLE 10H Change contents within a block
NAK 15H Negative acknowledge
LF 0AH Line feed
Signal Name Name Contents
WM Write Write data memory
WC Write CHR Write data memory as characters
Memory Contents Contents
0000H Global command not received
0100H ACK
Others Identical to NAK code (see page 23-16.)
Signal
Name
Name Contents Refer to:
RM Read Read data memory page 23-19
WM Write Write data memory (512 words maximum) page 23-21
TR Retry Retry when NAK [01] is BUSY page 23-22
WI Interrupt Setting Allow interrupt (Connection mode 1 : 1) page 23-23
RI Read interrupt status Read interrupt setting status (Connection mode 1 : 1) page 23-24
RC Read CHR Read data memory as characters page 23-18
WC Write CHR Write data memory as characters (1024 bytes maximum) page 23-20