Wachendorff MA964802 handleiding
Handleiding
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User manual - MA964802 23
8.8.c Digital input alarm (“Digital input 1..3” selection)
Alarm relating to digital input: the relay is activated with the digital input
enabled.
8.8.d Communication alarm (“Serial error”) selection
Alarm related to an error (oine) of the COM1 serial port. The relay is activated
when at least one variable exchanged on COM1 is OFF-LINE.
8.8.e Remote control alarm (“Remote ctrl” selection)
The relay is activated by writing 1 on Modbus 906 word for alarm 1 and Modbus
907 word for alarm 2. Writing 0 deactivates the relay.
9
COM1 serial port in Multimaster mode
The
MA964802
device,
aside from implementing standard Modbus master
protocol, also implements a variant called Multimaster. This mode makes it
possible to connect, aside from the various Modbus slave devices, up to 16
Pixsys Modbus multimaster devices on the RS485 serial network. This means
that it will be possible to implement reading and writing of slave data from
several MA964802 devices located at various points of the system.
A maximum of 16 MA964802 devices can be connected on the same network
in multimaster mode. The slave devices connected to a network with devices
in multimaster mode can have addresses from 1 to 238.
To configure the network of the multimaster system and to make it as efficient
as possible, it is recommended to number the MA964802 devices starting from
the address 254 (for the first multimaster device) and to descend to the address
239 (for the 16th and last multimaster device).
10 COM2 Serial Communication
MA964802 has the COM2 serial port (RS485) on which the Modbus RTU
slave protocol is active. This makes it possible to connect the device to a
supervision system or, more in general, to a Modbus RTU master device. Each
instrument will respond to an interrogation by the Master only if it has the
same address as that in the parameter
COM2 serial port -> Slave address
. The
addresses allowed go from 1 to 254 and there must not be devices with the
same address on the same line. The address 255 can be used by the master to
communicate with any
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Productinformatie
| Merk | Wachendorff |
| Model | MA964802 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 4022 MB |
