300-R010-45G datasheet(24/36 Pages) MAGNETROL

24 / 36 page

SOFTWARE CONFIGURATION cont.

On point for first

lead-lag relay

Off point for both

lead-lag relays

On point for second

lead-lag relay

Figure 16

Lead-lag Relay Configuration

Since the configuration for relays in a lead-lag group is the

same as alarm relays, refer to page 23 for configuration.

The DNRG < Setpoint screen will not be shown since lead-

lag relays cannot have the same value for “Relay On” and

“Relay Off.”

As shown in Figure 16, all the RELAY OFF points in the lead-

lag group should be the same value. This allows the lead-lag

cycle to reset when more than one relay comes on. The RELAY

ON points for the second, third, and fourth relays (if used), are

staggered above the RELAY ON point for the first relay.

Lead-Lag Relays cont.

I/O Configuration Menu (4-20 mA Output Settings)

Display

Keystroke

Comment and/or Additional Keystrokes

I/O Config

Press ENT

Enters the Relay Settings menu.

to select

Relay Settings

Press

Scrolls to the 4-20 mA Settings submenu.

to select

4-20 mA Settings

Press ENT

Enters the 4-20 mA Settings submenu.

to select

Enable/Disable

Press ENT,

Enables the 4-20 mA output. Press ENT and

to proceed to the next item.

Disable

Controlled by

Press ENT or

If unit is configured in the Level Only mode, this screen will not be displayed.

Level

Press

to have the 4-20 mA controlled by level, or ENT,

, ENT,

to have it

controlled by volume or flow.

4 mA Point

Press ENT

Inserts a

on the bottom line of the LCD which allows entry of the 4 mA point

xxxx units

value. After entering the 4 mA value, press ENT and

20 mA Point

Press ENT

Inserts a

on the bottom line of the LCD which allows entry of the 20 mA point

xxxx units

value. After entering the 20 mA value, press ENT and

Fault Mode

Press ENT

Determines the status of the 4-20 mA if a system fault is detected. Use the

Hold

to select either Hold, 22 mA, or 3.5 mA then press ENT and

Previous Menu

Press ENT

Reverts back to the 4-20 mA Settings menu.

to select

The 4-20 mA output can be controlled by either level, vol-

ume, or flow depending on which mode was selected in the

System Configuration Menu.

The RS-485 menu configures the Modbus digital communi-

cations port of the unit.

4-20 mA OUTPUT AND RS-485 SETTINGS

I/O Configuration Menu (RS-485 Settings)

Display

Keystroke

Comment and/or Additional Keystrokes

I/O Config

Press ENT

Enters the Relay Settings menu.

to select

Relay Settings

Press

twice

Scrolls to the Communication Port Setup submenu.

to select

Comm Port Setup

Press ENT

Enters the Communication Port Setup submenu.

to select

Address (0-247)

Press

or ENT

This screen is used to set the address for this particular unit during polling. Enter

the address via the keypad. Make sure that no other unit uses this same address.

Baud Rate

Press

or ENT

Set the baud rate (communication speed) for the unit. Baud rates of 9600, 4800,

9600

2400, or 1200 are available. Enter the baud rate via the keypad. This value must

match the Modbus settings of your system.

Parity

Press

or ENT

Set the parity bit at Even, Odd, or None via the keypad. This value must match

Even

the Modbus settings of your system.

Previous Menu

Press ENT

Reverts back to the Communication Port Setup.

to select

I/O CONFIGURATION MENU cont.

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