Product Description & Operating Manual EMS 13x / 23x / 33x
Beckmann GmbH © 2001
Page 27
3.4 Using the EMS timers in a network
3.4.1 General Information
An EMS timer can be used in a network as either a master or a slave device. One need only
ensure that each device receive a unique network node number. To do this, set a number between
1-31 in the parameter network node number (M6N5).
Please note:
Each timer must have a unique network node number.
As a matter of convenience, it makes sense to assign the network node number to the tanning
device number.
Using EMS timers in a network
Illustration 1: An example of a EMS-bus network with several EMS timers is shown on page 8.
In this configuration, the timer with the lowest network node number generates the EMSBUS
signal and tells the other timers to feed their information over status, operating mode etc. to the
EMSBUS. Furthermore, the timer with the lowest network node number switches all other timers
between Happy-Hour and normal mode.
If the EMSBUS connection to the master is broken, the timer with the next-highest network node
number takes over the master function. The same principle applies for interruptions to the power
supply. If, for example, the power cable between timer 4 an 5 is interrupted, the timer with
network number 5 takes over the master function for all timers with a network node number
higher than 5. The timer with network node number 1 continues to generate the EMSBUS signal
for timers 1 to 4.
The information passed to EMSBUS from the timers can be evaluated and displayed by passive
EMSBUS participants such as LED, remote display, TV overview etc.
If a modem box is hooked up to the network, all operating parameters as well as the register and
counter status of individual timers can be remotely queried. No changes need to be made to the
network electronics or software, the network node numbers need only be correctly assigned.
The modem box is always the master in a network. The behavior described above with regard to
network or power interruption applies also to a network with modem box.
If an EMSCASH box is hooked up to the network, purchases can be made through a connected
PC, and operating parameters can be queried and evaluated. Please note that only EMS 335 with
software version 2.13 or higher works together with the EMSCASH box. Older devices require
that the program processor be changed. The network node numbers need to be newly assigned.
The EMSCASH box is always the master, and cannot be in operation together with a modem
box.