Denali M1, Руководство пользователя

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D
ENALI
M1 52-13382-1
S
OLID
S
TATE
C
OOLING
S
YSTEMS
, 167 M
YERS
C
ORNERS
R
OAD
, W
APPINGERS
F
ALLS
, NY 12590
T
ELEPHONE
: (845) 296-1303 F
AX
: (845) 296-1303
WEB
:
WWW
.
SSCOOLING
.
COM
R
EVISION
E1
14
7.2 C
OMMUNICATION
P
ROTOCOL
Table 2: Command and Data Bytes
Bit Position Description Bit =1 Bit = 0
Command Byte Bit 7 (MSB) Set Remote Control remote control local control (chiller)
Bit 6 Remote On/Off chiller On chiller in standby
Bit 5 Communication
Direction
remote to chiller
(command from master)
chiller to remote
(status from chiller)
Bits 4 – 0 Parameters being communicated (see table 2)
Data Bytes 1 or 2 bytes depending on parameter (see tables 3 and 4)
Table 3: Control Parameter
Bits 4 – 0 Parameter No of Data Bytes
00001 Chiller set point temperature 2
01001 Current temperature at chiller coolant output 2
01000 Faults from chiller (fan, RTD failure, etc.) 1
Table 4: Temperature Data Bytes (2 bytes)
The 2 data bytes for the temperature set point and transmission of the current temperature represent the
value of the temperature in 0.1o C increments.
For example:
Temperature (examples) High Byte Low Byte Hexadecimal
0.1
°
C 00000000 00000001 0001
1.0
°
C 00000000 00001010 000A
10.0
°
C 00000000 01100100 0064
20.0
°
C 00000000 11001000 00C8
30.0
°
C
00000001 00101100 012C
40.0
°
C
00000001 10010000 0190
Table 5: Faults Data Byte (1 byte)
0 = OK, 1 = Fault
Bit Position Fault Assigned Hex value when fault is present
7 (MSB) Temperature below alarm range 80
6 unassigned N/A
5 unassigned N/A
4 RTD fault 10
3 unassigned N/A
2 Temperature above alarm range 04
1 unassigned N/A
0 Tank Level Low 01