Spectrum Controls 1769sc-HART Modules - Manual (Page 57)

Chapter 4: Module Data, Status, and Configuration
User's Manual 0300215-03 Rev. A
6-7
NOTE Default settings for a particular function are indicated by zero(s). For example,
the default filter frequency is 60Hz. Publication
Handle Timeout
There is a handle timeout associated with the final reply message. After the module
obtains the requested information from the HART device, it will start the Handle Timeout
timer. The reply message will be kept in memory during the Handle Timeout period.
After the timeout occurs or after the message is retrieved by the pass-through response
query command, the storage buffer will be discarded, and another pass through message
will be serviced without being rejected. Handle Timeout is in the range of 0 to 255
seconds.
Note: A handle timeout of zero is valid. When set to zero the handle timeout will
default to 10 seconds.
Channel HART Enable (Bits 8, 9, 10, 11)
These bits allow the user to enable HART on channels 0 through 3, respectively.
Pass-Through Scheme
The pass-through scheme determines how often a pass through command is serviced.
•
Two Channel Scans: Pass-through serviced once every two channel scans
•
Once Per Module Scan: Pass-through serviced once per module scan
•
Every Channel Scan: Pass-through serviced once every channel scan
Note: The pass-through scheme can increase the HART packet update time if pass-
through messages are serviced every channel scan. Refer to Chapter 7 for more
details.
ETS (Enable Time Stamp)
Allows module time stamping function to be enabled. See section 6.3.2 for more details.
6.4.3 Filter Frequency and General Settings (Words 2, 8, 14, 20)
This section of the configuration allows the user to configure filter frequencies, enable or
disable the associated channel, etc.