'
Example PRINT #1,CHR$ (&H1B);”A”
4-3 Flow of Control and Notification Using Commands
The flow of control and notification to and from the PT using commands is de-
scribed below.
Refer to the following sections for information on how to use each command:
Section 5 Operating Commands
Section 6 Terminal Commands
Section 7 Online Transfer Commands
4-3-1 Operating Commands
The operating commands display monitored data from the production line and
messages to the factory workers. They are also used for PT control and man-
agement.
The communication flow betweenthe host computer and PT differs according to
the following three cases:
Message from Host Computer to PT
Host computer program PT operation
Message to PT Process message
Message operating command
Enquiry from Host Computer to PT
Host computer program PT operation
Enquiry operating command
Enquiry
Receive command
Receive command
Send response command
Response operating command
Notification of Operation at PT to the Host Computer
Host computer program PT operation
Receive notification
Notification operating command
Send notification command
4-3-2 Terminal Commands
The terminal commands allow the PT to be used as a terminal of the host com-
puter to display text and graphics independently of the screens stored in the PT.
The host computer sends a command and the PT processes the message. The
PT does not send back a response to the host computer.
Host computer program PT operation
Message to PT
Terminal command
Process message
4-3-3 Online Transfer Commands
The online transfer commands conduct batch transfer of screens and memory
tables.
These commands are used to set up a production process and to back up data
for maintenance.
Note The commands cannot be used with NT20M or NT600M PTs fitted with an
EPROM or EEPROMimagememory. The commands are only applicable to PTs
with SRAM memory.
"! #
Section 4-3
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