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10
Direct Connection Function
Section 1-5
1-5
Direct Connection Function
The communication method applied between the NT11S and the PC is either a
host link or NT link.
The NT11S can be used to refer to the contents necessary for the display informa-
tion or to allocate the bits and words used for storing the input data to any area in
the PC. The NT11S can directly write and read such allocated bits and words so as
to change the display elements, control the operating status, and notify the status.
This function is called the “direct connection function”. The NT11S is designed ex-
clusively for use with the direct connection.
The bits and words allocated by the direct connection function are called “allocated
bit” and “allocated word” respectively.
This function allows to read the information to be displayed on the NT11S from the
memory area in the PC and to write it to the memory table in the NT11S. Also, the
data input on the NT11S can be written to the PC’s memory area. The NT11S
screen status can be switched according to the PC’s memory area, and the
NT11S’s status data can be written to the PC’s memory area.
NT11S
PC
Data memory area
Internal relay area
Auxiliary relay area
Timer/counter
Features of the Direct Connection Function
S
The bits and words referring to operating status and work instruction information
and those for storing input data can be freely allocated to almost any part of the
PC memory. Bits and words in the PC can be referenced from any memory table.
S
The NT11S can directly refer to PC bit and word data so that it can be connected
to a PC without changing the PC program which controls currently running pro-
duction line.
S
The area to control and notify the NT11S status, including display screens, ON/
OFF of the backlight, and printing of daily reports and display histories, can be
freely allocated to any part of the PC memory.
The direct connection function allows the NT11S to directly read and write almost
all bits and words in the PC and to automatically change the NT11S screen display.
This function can reduce the load on the PC so that the program development effi-
ciency of the PC improves.
Summary of Contents for NT11S
Page 1: ...Cat No V029 E1 2 NT11S Programmable Terminal OPERATION MANUAL ...
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Page 5: ...iii NT series Programmable Terminal Operation Manual Produced June 1997 ...
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