Honeywell CM4 - Page 37

32 Rev. 2.4 (3/05)
Honeywell Analytics CM4 Protocol Manual
Set Key-Code This command allows you to recongure the
0x52 keypad lock-out and key code. The keypad can be
disabled, preventing unauthorized user
intervention by enabling the keypad lockout
(bit 0). This congures the keypad and a new key
code. The old key code must match the code
currently programmed into the CM4 monitor for
this command to succeed in changing the code.
Command packet to instrument:
Command Code (0x51) - 1 byte
Keypad Status - 1 byte
bit 0: Keypad lock-out function
0 = Disable
1 = Enable
bits 1-7: Undened
Old Key code - 2 bytes (valid 0000-9999)
New Key code - 2 bytes (valid 0000-9999)
Response packet from instrument:
Command Code (0x51) - 1 byte
CM4 Date - 2 bytes
CM4 Time - 2 bytes
Status -1 byte
0x00 = Saved and veried
0x01 = Key code invalid
0xff = Error, not saved