User Manual, Firmware rev. 3.0 or LATER Owner's manual

162 Publication 1404-UM001F-EN-P - November 2009
Chapter 8 Advanced Features
Read-back Mode
The data client uses the indexed read method to read oscillogram
capture data. The readback mode options include the following:
• Auto-increment all channels: successive reads of the
Oscillograph Results
table increment through all remaining
blocks of the current channel, increment through all remaining
channels and wrap back to the original channel.
• Auto-increment current channel: successive reads of the results
table will increment through all remaining blocks of the current
channel only.
• Manual increment: each write of the Oscillograph
Configuration/Read-back Data Select table specifies the channel
and block to be read in the next read of the Oscillograph Results
table. Successive reads of the results table returns the same
block of data each time if no read-back select write is done.
Reading Oscillograph Data
Read oscillograph data from the Oscillograph Results table by using
the indexed read method. Oscillograph data is not available via
Modbus communication. This read-only table comprises these 29
(DeviceNet network) or 59 (all other communication options) integer
elements:
• Capture timestamp: in three elements using the standard
timestamp format except the year is omitted
• Capture number: in the range 1…8 (M6) or 1…2 (M8)
• Channel number: in the range 1…7 (see above)
• Block number: block number of the data contained in the table
(see above)
• Capture type: in the range of 1…5 (see table above)
• Trigger statistics: see below. Range 0…22,999.
• Trigger position: data point corresponding with the trigger
position. See below.
• Oscillograph data points: See below.