Function Diagnosis (H08 or 08) - PENN Controls - VFD68Bxx - VFD68Cxx - VFD68Dxx - Three‐Phase Motor Speed Controller - VFD68 Three‐Phase Variable Frequency Drive

VFD68 Variable Frequency Drives Technical Bulletin

Brand
PENN Controls
Product name
VFD68 Three‐Phase Variable Frequency Drive
Document type
Technical Bulletin
Part number
24-7664-3051
Document revision
C
Revision date
2019-08-09
Language
English

A communication check can be made because the query message that was sent is returned unchanged as a response message (function of subfunction code H00).

Table 1. Query Message
Subordinate Address Function Subfunction Date CRC Check
(8 bit) H08 (8 bit) H00 (8 bit) H00 (8 bit) H (8 bit) L (8 bit) L (8 bit) H (8 bit)
Table 2. Normal Response (Response Message)
Subordinate Address Function Subfunction Date CRC Check
(8 bit) H08 (8 bit) H00 (8 bit) H00 (8 bit) H (8 bit) L (8 bit) L (8 bit) H (8 bit)
Table 3. Query Message Setting
Message Setting Description
Subordinate Address Address to which the message is sent. Broadcast communication cannot be made: 0 is an invalid setting.
Function Set H08
Subfunction Set H000
Data Any data can be set if it is 2 bytes long. The setting range is H0000 to HFFFF.
Table 4. Normal Response Message to Query1
Message Setting Description
Subordinate Address Address to which the message is sent. Broadcast communication cannot be made: 0 is an invalid setting.
Function Set H08
Subfunction Set H000
Data Any data can be set if it is 2 bytes long. The setting range is H0000 to HFFFF.

For broadcast communication, no response is returned in reply to a query; therefore, the next query must be made when the VFD processing time has elapsed after the previous query.

1 Subordinate address, function, subfunction, and CRC check of the normal response are identical to those of the query message.