Yaskawa Portable Control Display Unit User Manual

Page 35

TEST MENU

Test (TST) Menu

01/22/96

TEST (TST) MENU

Trace Monitor

Function #980

The Trace Monitor function # 980 allows
real-time data that exists at a given PAC
block’s input or output to be displayed. An
analogy could be drawn between the
function of the Trace Monitor function and
troubleshooting a circuit board if that
circuit board had a test point for every
component on the board. There is only one
restriction on tracing PAC blocks. The
only points that may be traced on a PAC
diagram are those points where one PAC
block is directly connected to another
PAC block. In other words, the output of a
NUMO block or the inputs to a NUMI
block cannot be traced since these points
are not directly connected to another block.

There are four Trace Buffers available to
hold trace information. It is possible to set
up the Trace Buffers so that each buffer is
collecting different data simultaneously.
The Trace Monitor requires the operator to
set up each buffer with the PAC block
number and the I/O number to be traced if
the PAC block has more than one input
and/or output. For this reason, a PAC
diagram is required if tracing is to be
attempted.

The Trace Monitor function is available
only on the PCDU. The drive’s LCDU
display will show “ Pcdu ” if function #
980 is selected.

The PAC block numbers used in this
section are for illustrative purposes only.