SMC Networks HRSH Series, Руководство по эксплуатации

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HRX-OM-Q033
Chapter 5 Simple communication protocol function
HRSH Series 5.6 BCC
5-15
5.6 BCC
EXOR algorithm of all characters from STX to ETX is read with the check
code for error detection.
This BCC is not included in “response” if BCC check is not selected when
setting the communication.
Displayed in one digit of ASCII code in the message frame.

Calculation example
●
Message for BCC
[STX] 01RPV1 [ETX]
●
Calculation
ASCII HEX
[STX] 02
‘0’
30
‘1’
31
‘R’
52
‘P’
50
‘V’
56
‘1’
31
[ETX] 03
‘e’
65
←
Code for EXOR from STX to ETX is BCC.
●
Sending message
[STX] 01RPV1 [ETX] e
5.7 Command
Table 5.7-1 shows the commands which are supported by the product.
No response is returned for a request message of a command which is not in
Table 5.7-1.
Table 5.7-1 Command list
NO Command Name R/W Explanation
1 PV1
Circulating fluid
discharge
temperature R
Read the circulating fluid discharge temperature in the
temperature unit of the product. The circulating fluid
discharge temperature (offset temperature if offset setting is
selected) which is displayed on the operation display panel
PV part.
e.g. In case of 19.8
o
C
00198
2 SV1
Circulating fluid
set temperature
R/W
Write/read the circulating fluid set temperature in the
temperature unit of the product. Writing is available only in
serial mode.
e.g. In case of 35.8
o
C
00358
3 LOC Key-lock setting R/W
Write and read the key-lock setting.
00000
：
Unlocked
00001
：
All locked
00002
：
Setting mode value is locked
00003
：
Key lock other than for set temp.
Key-lock setting of this product just receives the command.
This command does not actually lock the keys.
This function is to make this product interchangeable with
the communication specifications of SMC’s HRG/HRGC
series thermo coolers. When not using this product as a
replacement for HRG/HRGC, this function is not needed.
4 STR Store the data W Store the data to the product (Write to FRAM)