Yaskawa Portable Control Display Unit - Manual (Page 41)

6 TEST MENU
35 The Trace Monitor Function
01/22/96
The PCDU software will begin to check
flags set by the tracing routines and
displays the current value (logic or
numeric) when it is valid. There are some
instances where a request to trace a PAC
block cannot be honored. For example, a
requested I/O for a valid block may not be
available. If this occurs, the PCDU
displays:
If the PAC I/O can be traced, the display
will show the current value in the proper
format. It is important to realize that the
Trace Buffer will only be alerted to data
from a given block after its buffer has been
programmed correctly. If a Trace Buffer
has been programmed to capture data from
a block located in a conditional scan, that
data will not be observed until the
conditional scan in question is able to run.
When this condition is present, the PCDU
will display a waiting message on the
bottom line as shown:
The PCDU can display fixed point numeric
data, floating point numeric data, or logic
data from appropriate PAC blocks. The
actual display will vary depending on what
kind of data is being viewed. The display
Blk 00960 Out 00
#0 Waiting . . .
Blk 00960 Out 00
#0 Invalid I/O