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Glossary
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A four-digit code which is output to a word in the IR area to identify the type
of error which has occurred.
A device used to ensure positioning accuracy when positioning via pulse
trains. The error counter receives a target position as a specific number of
pulses in a pulse train from the Position Control Unit and outputs analog
speed voltages to drive a servomotor accordingly. The specified number of
pulses in the error counter is counted down by feedback from an encoder
measuring actual motor shaft movement, causing voltage output to stop
when the number of pulses equals zero, i.e., when the target position has
been reached.
A positioning action completion code that causes pulses to be continually
output until the positioning action is terminated with STOP.
A positioning action completion code that causes pulses to be continually
output until the positioning action is terminated with STOP. After STOP is ex-
ecuted, positioning does not stop immediately but is executed according to
the data set for the positioning action.
A function whereby positioning may be stopped or speed may be changed,
during operation, in response to an external command.
A bit that is turned ON and OFF automatically by the system to provide sta-
tus information.
A computer that is used to transfer data to or receive data from a PC in a
Host Link System. The host computer is used for data management and
overall system control. Host computers are generally small personal or busi-
ness computers.
The last five of the ten IR words allocated to each Position Control Unit as
refresh areas.
Manual feeding wherein positioning is executed one pulse at a time.
A target position given in respect to the present position, rather than in re-
spect to the origin.
The present position when START is executed.
A PC data area allocated for inputs, outputs, and work bits. In the C200H,
words 100 through 199 of this area are reserved for Special I/O Units, includ-
ing the Position Control Unit. The Position Control Unit uses these words for
I/O refresh areas.
An internal circuitry which is selected, via a front-panel switch, based on the
type of motor driver and signals which are to be used for a particular type of
operation.
Normally-closed contacts. A pair of contacts on a relay that open when the
relay is energized.
Normally-open contacts. A pair of contacts on a relay that close when the
relay is energized.
error code
error counter
extended (completion)
extended with positioning
(completion)
external interrupt
flag
host computer
IN refresh area
inching
incremental target position
initial position
IR area
mode
NC contacts
NO contacts