Fuji Electric Monitouch S8 series, Connection Manual

Page: 341 / 406

23-6 23. Universal Serial Communication
Universal Serial
*1 Interrupt settings can be changed from the host using the [WI] command during communication.
For details on interruption, see “23.4.4 Interrupt (ENQ)”.
Text Process
When using text process, choose either [LSB
→
MSB] or [MSB
→
LSB] in order to make arrangements for
the order of the first and the second bytes in one word.
[LSB
→
MSB]
MSB LSB
15 0
2nd byte 1st byte
[MSB
→
LSB]
MSB LSB
15 0
1st byte 2nd byte
Read Clear Top Address
*2
Set the top address number of the read clear area.
The read clear area is the starting area from which the S8 series clears data that was previously read.
Due to the fact that it is cleared to “0”, once this area is read, the data remains at “0” even if you attempt
to read again when a read response error occurs.
Read Clear Word Counts
*2
Set the number of words that will be used for clearing the read area.
Read Clear Saving
*2
Set the top address for the read clear backup area. The area size will be the same as the previously
described read clear area.
The number of words written in the read clear backup area are the same as the number specified for the
read clear area.
Switch ON Interrupt
*1
Select whether or not to enable or disable an interrupt when the switch changes from OFF to ON.
Switch OFF Interrupt
*1
Select whether or not to enable or disable an interrupt when the switch changes from ON to OFF.
Keypad Interrupt
*1
Select whether or not to enable or disable an interrupt when the switch on the keypad or the ENT switch
on the keyboard is pressed and it changes from OFF to ON.
Screen Interrupt
*1
Select whether or not to enable or disable an interrupt when the screen change switch is pressed.
Flow Control
This option is valid only for 1 : 1 communication via RS-232C using COM2.
Check this box when disabling an interrupt from the S8 series (e.g. when the host cannot receive
interrupt data).
When this box is checked, the action shown below takes place.
• Interrupt enabled when CS (pin 8) on the S8 series side is ON
• Interrupt disabled when CS (pin 8) on the S8 series side is OFF
When CS is ON, interruption information stored by then is output in succession. (Interruption
information for 3 times can be stored at the most.)
Do not turn output OFF
This option is valid only for 1 : 1 communication via RS-422 using four-wire.
Normally, S8 series uses the same cables to send or receive data. For this reason, send output
remains OFF (High impedance) except for sending signals from S8 series.
However, depending on the host specifications, send output OFF operation from the S8 series is not
required. In this case, check [ Do not turn output OFF].
2-Wire System
This option is valid only for 1 : 1 communication with RS-422 using two-wire.
When this box is checked, interrupt is disabled.