5 Structure of status bytes
Status byte 1 (CODE 01) Status byte 2 (CODE 02)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
KS 40
PA 1 PL 0 FB A1 KL HZ
KS 40
PA 1 0 HC PG 0 0 LR
KS 50
PA 1 PLA2FBA1KLHZ
KS 50
PA 1 0 HC PG 0 0 LR
KS 90
PA 1 PLA2FBA1KLHZ
KS 90
PA 1 F2 Y2 PG WE AH LR
Description 0 1 Description 0 1
HZ
Heating on off
LR
Control mode local remote
KL
Cooling on off
AH
Operation mode automatic manual
A1
LC1-Alarm off on
WE
Set-point eff. extern intern
FB
Sensor condition correct break/short circ.
PG
Progr./ramp inactive active
A2
LC2-Alarm off on
HC
Heat.curr. alarm off on
PL
Sensor polarity correct wrong
Y2
Output var. Y2 inactive active
Bit6
fix value always logic 1
F2
Sensor 2 cond. correct break/short circ.
PA
Parity EVEN
Bit6
fixed value always logic 1
PA
Parity EVEN
Permissible characters hex dez Permissible characters hex dez
KS 40
1000000...1101111 40...6F 64...111 @...o
KS 40
1000000...1011001 40...59 64...89 @...Y
KS 50
1000000...1111111 40...7F 64...127 @...
KS 50
1000000...1011001 40...59 64...89 @...Y
KS 90
1000000...1111111 40...7F 64...127 @...
KS 90
1000000...1111111 40...7F 64...127 @...
6 Communication examples
The structure of communication strings for B2-codes is shown in chapter 3.1.
q Example 1: The computer requests Pb2 (CODE 22) from controller with address 00.
Request EOT 0 0 2 2 ENQ
ADR CODE
Controller replies STX 2 2 = 1 2 . 0 ETX BCC Pb2 = 12.0 [%]
CODE VAL
q Example 2: The computer sets Pb1 (CODE 21) = 399.9 [%] of controler with address 01.
Transmission EOT01STX21=399. 9ETXBCC
ADR CODE VAL
Controller replies ACK or NAK in case of error
q Example 3: The computer requests the operating block (CODE 00) of controller with address 23.
Request EOT 2 3 0 0 ENQ
ADR CODE
Controller replies STX@, E, 4.5, 4.7, , 1000ETXBCC
01 02 03 ... 07 09
The reply comprises the values of Codes 01...09, each separated by a comma. Exceptions: The missing
Code 08 is replaced by a comma without value, and there is no comma after the value of Code 09.
The values of Codes 01 and 02 are coded bit by bit, the values of the other Codes are ASCII-coded.
Structure of status bytes English
Interface description 9499 040 47701 6 960612
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