Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 145)

Operator Interface 3-71
7000 “A” Frame 7000A-RM001A-EN-P – January 2011
– Control: number of control codes that did not conform to the
anticipated ACK or NACK. The operator interface will have
assumed ACK, which if wrong will result in a time-out error.
– Seqnce: number of responses from the drive that did not
correspond to the last request sent.
To reset the above counters, press the [F8] key.
The BUFFERS show the current contents (in hexadecimal) of the
Transmit (TX) and Receive (RX) buffers contained in the operator
interface. These buffers are circular in nature. The Psh (push) and
Pop values indicate the location in the buffer where the next character
will be loaded or unloaded respectively. If the values are equal, then
the buffer is empty. To aid in viewing the buffer locations, the cursor
keys can be used to highlight the buffer contents. The current location
of the cursor is shown in reverse video in the mid-right screen.
Protocol Analyzer
The protocol analyzer is accessed from the COMMUNICATIONS
screen by pressing the [F7] key. The screen shows the data and the
relationship of the data exchanged between the operator interface and
the drive board. This data can be displayed in either one of two formats:
– the data shown in hexadecimal (Figure 3.99 )
– the data shown as a mixture (Figure 3.100) of:
a) control characters
b) printable ASCII characters
c) hexadecimal data.
Figure 3.99 – Hexadecimal Displayed