Hengstler signo 723.1 Operating instructions

$UWLFOH 1R    5HY 
Supplement to the
Operation Manual
signo 723.1
Variable Preset Counter
signo 727.1
Position Indicator
RS485 / RS232 Protocol Hengstler TP3
This description is a supplement to the manual
2 723 093 (for signo 723.1) and 2 727 033 (for
signo 727.1).
It contains the feature description of the interface
options for the counters. It also contains hints
required for the installation and connection of a
counter to an RS 485 bus or to RS 232.
Ordering information
Interface-
option Power-supply Ordering code signo 723* Ordering code signo 727* Ordering code RTC** Ordering code
signo 723Print***
RS 485 12..24 VDC 0 723 160M3 0 727 160M3 0 723 169
RS 485 115..230 VAC 0 723 161M3 0 727 161M3 0 723 169
RS 232 12..24 VDC 0 723 150M3 0 727 150M3 0 723 150M1
RS 232 115..230 VAC 0 723 151M3 0 727 151M3 0 723 151M1
* This ordering code characterizes the interface protocol option TP3.
** An RTC is required when connecting one or more counters to an RS 485 bus.
*** 723Print with only Write-function and baudrate 4800 Baud. (See also 2 723 085)
Interface parameters
Two interface parameters have been added to service level 3:
Parameter Display Alternatives Meaning
Baud Rate
'F14' 1.2
2.4
4.8 *
1200 baud
2400 baud
4800 baud
Bus Address
'F19' 0
1
...
31
Interface deactivated
physical address 1
...
physical address 31
* Factory set, compare F30
Please set F14 and F19 according to the values of your network configuration. The settings for data, parity and
stop bits cannot be changed (see technical data on next page).

$UWLFOH 1R    5HY 
Connection to RS 485
Up to 31 counters can be connected together to form a bus. Each counter must have a unique bus address
(parameter F19 ). Communication between PC and the counters runs through the bus converter RTC and is
controlled by by the Hengstler Terminal Server program by means of the protocol Hengstler TP3 .
Please determine a unique bus address for each counter (1..31) and note it down. The RS 485 bus must be
terminated on both ends with a resistor of 560 Ohm each. You can use a wire wound resistor (for instance 0,25
W).
A
B
B
A
18 171920
Buscable
Back of si
g
no 723/727
18 171920
A
B
560 Ohm
Bus Cable
Termination
Back of signo 723/727
Technical Data RS 485
Connection line: Twisted and shielded; shielding to
terminal 19
Connections A/B
Input resistance. typ. 12 kOhm
Input amplitude max. ± -7..+12V
Output level typ. High: 3,5V, Low: 1,3V
Output current max. ± 60mA
Data Transfer
Baud Rate 1200, 2400, 4800 Baud
Data format 7 data bits, even parity, 1 stop bit
Protocol Hengstler TP3
Noise immunity: Data transfer may be disturbed
temporarily by EMC, which is recognised
and automatically repeated by the
protocol
Connection to RS 232
You can connect a single counter with RS 232 directly to a modem or to a PC. With F19 you set the counter's
address which is used by the Hengstler Terminal Server program.
RS232 Gnd TxD RxD
18 171920
Back of signo 723/727
Technical Data RS 232
Max. length of line: 15m
Input RxD
Input resistance typ. 5 kOhm
Input voltage max. ± 30V
Output TxD
Output voltage typ. ± 8V
Output current max. ± 20mA
Data Transfer see RS 485
All other technical data are in accordance with chapter 6 of the underlying operation manual.
Upon counter overflow an appropriate message appears in the display. For safety reasons the serial
interface is locked out until the counter has been reset manually.