Altronic CDM-2100 Betriebshandbuch - Seite 8

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from the menu, use  or  to scroll to RESET and press ENTER. The display

will show RESET!. A reset can also be performed by sending a reset command

via the RS-485 Modbus RTU communications register.

8.5.1

MIN/MAX READING

Use the  or  arrow key to point to MIN/MAX READING and press ENTER;

The display will show RESET!. RESET resets both the min and max readings to

the current reading.

RESET:

~MIN/MAX READING

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8.6

COMMUNICATIONS

8.6.1

The CDM-2100 gauge is part of a system that has been carefully designed to

easily interface to popular computers, terminals, programmable controllers

and Altronic instruments. Modbus RTU is the protocol used in the CDM-

2100. A Modbus register list with register numbers and descriptions of

each register can be found in section 10.0. The serial communications are

compliant to the Modicon Modbus RTU standard and uses RS-485 for its

hardware communication format. To view or adjust the communication

parameters, select COMMUNICATIONS from the main menu and press

ENTER. Throughout the menu use the  or  arrow keys to make a selection

and press ENTER to save the changes.

FOR DETAILED COMMUNICATIONS INFORMATION SEE SECTION 9.0.

COMMUNICATIONS

~NODE:

BAUD:

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8.6.2

NODE

The node number gives each gauge on the communications port an identity.

Any node number from 1 to 99 can be used. Use the up and down arrow keys

to select a node number and press ENTER to save.

8.6.3

BAUD — Select the required baud rate and press ENTER to save.

SEE SECTION 9.3 FOR AVAILABLE BAUD RATES.

8.7

SECURITY

8.7.1

The security feature allows for a user to lock the gauge to secure chosen areas

of the menu from being changed. There are several individual areas in the menu

system that can be protected as well as two layers of protection. The menus

that can be protected are the CONFIGURATION menu settings, the SETPOINT

values, the ability to make changes via modbus COMMUNICATIONS, and

CDM-2100 OM 3-21

CHANNEL 1

9600