300-R010-45G Datasheet, PDF (24/36 Pages) Magnetrol International, Inc. – Echotel® Model 300/301 Ultrasonic Non-Contact Transmitter For Level/Volume/Open Channel Flow

SOFTWARE CONFIGURATION cont.
I/O CONFIGURATION MENU cont.
Lead-Lag Relays cont.
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.
On point for second
lead-lag relay
On point for first
lead-lag relay
Off point for both
lead-lag relays
Figure 16
Lead-lag Relay Configuration
4-20 mA OUTPUT AND RS-485 SETTINGS
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.
Display
I/O Config
to select
Relay Settings
to select
4-20 mA Settings
to select
Enable/Disable
Disable
Controlled by
Level
4 mA Point
xxxx units
20 mA Point
xxxx units
Fault Mode
Hold
Previous Menu
to select
Keystroke
Press ENT
I/O Configuration Menu (4-20 mA Output Settings)
Comment and/or Additional Keystrokes
Enters the Relay Settings menu.
Press
Scrolls to the 4-20 mA Settings submenu.
Press ENT
Enters the 4-20 mA Settings submenu.
Press ENT,
Enables the 4-20 mA output. Press ENT and to proceed to the next item.
Press ENT or
Press ENT
Press ENT
Press ENT
Press ENT
If unit is configured in the Level Only mode, this screen will not be displayed.
Press to have the 4-20 mA controlled by level, or ENT, , ENT, to have it
controlled by volume or flow.
Inserts a on the bottom line of the LCD which allows entry of the 4 mA point
value. After entering the 4 mA value, press ENT and .
Inserts a on the bottom line of the LCD which allows entry of the 20 mA point
value. After entering the 20 mA value, press ENT and .
Determines the status of the 4-20 mA if a system fault is detected. Use the
to select either Hold, 22 mA, or 3.5 mA then press ENT and .
Reverts back to the 4-20 mA Settings menu.
Display
I/O Config
to select
Relay Settings
to select
Comm Port Setup
to select
Address (0-247)
1
Baud Rate
9600
Parity
Even
Previous Menu
to select
Keystroke
Press ENT
Press twice
Press ENT
Press or ENT
Press or ENT
Press or ENT
Press ENT
I/O Configuration Menu (RS-485 Settings)
Comment and/or Additional Keystrokes
Enters the Relay Settings menu.
Scrolls to the Communication Port Setup submenu.
Enters the Communication Port Setup submenu.
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.
Set the baud rate (communication speed) for the unit. Baud rates of 9600, 4800,
2400, or 1200 are available. Enter the baud rate via the keypad. This value must
match the Modbus settings of your system.
Set the parity bit at Even, Odd, or None via the keypad. This value must match
the Modbus settings of your system.
Reverts back to the Communication Port Setup.
24