Honeywell VC4 User Manual page 143

Get Maintenance Dates - 0x34
This command queries the maintenance items.
Command packet to instrument:
Command Code (0x34) - 1 byte
Response packet from instrument:
Command Code (0x34) - 1 byte
VC4™ Date - 2 bytes
VC4™ Time - 2 bytes
Last Power Down Date - 2 bytes
Last Power Down Time - 2 bytes
Last Power Up Date - 2 bytes
Last Power Up Time - 2 bytes
Flow Balance Date - 2 bytes
Flow Balance Time - 2 bytes
Optics Calibration Date - 2 bytes
Optics Calibration Time - 2 bytes
Date Chemcassette™ Replaced - 2 bytes
Time Chemcassette™ Replaced - 2 bytes
Date Int. Filter Replaced - 2 bytes
Date Ext. Filter Replaced - 2 bytes
Status - 1 byte
0x00 = No errors
0xFF = Error
Get Point Configuration - 0x35
This command queries an individual point for its current configuration. Command packet to
instrument:
Command Code (0x35) - 1 byte
Point Flag - 1 byte
bits 0-1: Point Number
00 = Point 1
01 = Point 2
10 = Point 3
11 = Point 4
bits 2-7: Undefined
VC4™ 143 User Manual