Series 72 manual page 15 – COSA Xentaur Hygrocontrol Type 72 User Manual
Page 19
Series 72 Manual page 15
00809 is to read 80.9 %RH (or other dimension)
9.2. MODUS 2: Software Handshake, controlled by Host
It is necessary that: Signal CTS is connected to +12V. (Bridge RTS-CTS)
9.2.1. Control of stand-alone Transmitter (XON/XOFF-Handshake)
For this, the address of the transmitter must be "0"
The following ASCII-codes will cause actions:
XON:
(17dez,11hex) String as in Mode 1 will be send.
XOFF:
(19dez,13hex) ends data transfer after next Byte and
deactivates digital output.
CAN:
(24dez,18hex) deactivates digital output.
P:
(80dez,50hex) prepare a Polling. All following codes
(besides "P") will be read and sent again. After a second
"P" was read, the transmitter will send a string
according to protocol 2 (s. b.) and then the code "P"
9.2.2. Control of Transmitters on BUS (XON/XOFF-Handshake)
An address >0 is necessary for all transmitters on BUS.
In this mode, the lines TxD and RxD are internally connected, which results in a
ring of up to 99 transmitters.
Control of transmitters is done by ASCII-codes as follows:
XOFF: (19dez,13hex) ends data transfer after next Byte and
deactivates digital output
CAN:
(24dez,18hex) deactivates digital output.
P:
(80dez,50hex) prepares a Polling. The ring of BUS-lines
is opened, all following codes (besides "P") are read
and sent again. After "P" was read a second time, the
string of protocol 2 is sent and followed by code "P".
This ends the transmission and closes the ring-BUS.
NOTE: In a ring BUS structure, a sending of "PP" results in getting strings of
measurement values sent from all transmitters. At the end of the transmitting
sequence, the host will get "P" as the final code.
N:
(78dez,4Ehex) starts addressing. An address consisting
of 2 decimals and an order-code are to follow. The
string must be ended with
address is the correct one for the transmitter, it will
carry out the order. At the moment, the orders may be: