BRONKHORST HIGH-TECH B.V.
9.17.024
Page 12
- After a reset command, also send by the Readout/Control module or PC-program, the new module will
be operational on the FLOW-BUS system.
Note: make sure to install only one new module at the same time.
2.6.3
Install to bus on a pre-defined node-address or re-address instrument on the bus
In some applications it is necessary to put FLOW-BUS devices on pre-defined addresses because of the
application software expecting this device on this address (e.g. PLC-applications). This can be done as follows:
(Install new module to the bus as described in the previous paragraphs.)
- By means of the micro-switch on the instrument. See instruction manual 9.17.023.
- By means of the special menu in an E-7000 module for digital instruments it is possible to (re-)
address instruments on the bus.
- Go to the specific menu part and read the PNA (Primary Node Address) number.
- Fill-in the address you want the instrument to have on the bus.
- The E-7000 module will check if this address is already occupied by another instrument. If so,
you could remove the other one and try again, or enter another address.
- The module will restart and will get its new address from that moment on.
Note 1:
Because it is not allowed in a FLOW-BUS system to have 2 devices on the same node-address, at (re)start of the
instrument there will also be a check performed if its node-address (in memory) is already occupied by another
device. If so, the red LED will blink slowly. At that moment the module is not operational on the bus. You first have
to re-install it.
The easiest way to do this is to press the micro push-button on top of the instrument until the green LED starts
blinking fast. After releasing the button the instrument will install itself on the bus automatically on a free address.
When the green LED is burning continuously, the instrument is operational.
Note 2:
If you take one or more modules out of your system, or if one or more modules do not get power, be careful
installing new modules, or changing the configuration.
This situation may occur if you take modules out for service. If you don’t change the configuration, you can
replace your serviced instrument/module in your system without any problem.
Mostly new modules will get the first free address, counted from address 3 (3 will be the first). This could be an
address which should not be occupied (e.g. from a module which has been taken-out for service). In that case
install the new module and re-address it as described, to avoid FLOW-BUS communication problems.
Note 3:
When connecting an instrument/module to the FLOW-BUS, make sure that the instrument/module is in power-off
mode.
After connection to the bus you can switch power on.
At power-up there will be a check to avoid the situation of two modules on the same bus address.
This is important for error-free bus-communication.
2.6.4
Install to bus via rotary switches on the side of the instrument (if present).
On the side of the instrument are rotary switches placed and a label
with the explanation of the switches. Make sure to use a screwdriver
which is suited for the switches.
The switches have the following function:
NODE ADDRESS (00 – 99)
With the NODE ADDRESS switch, the instruments address can be set. The MSD is the high part of the decimal
number and the LSD the low part. For instance address 25 means MSD on 2 and LSD on 5.
The default switch position is 00. In this position the address is software programmable.
