Specifications

Control Valves - SMARTLINK
®
MRV
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combustion systems for industry
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10-30.7-80
E - i - 3/14
50120624-001/
Table 12: SMARTLINK
®
MRV User Commands - Command Set ‘A’
Table 12: SMARTLINK
®
MRV User Commands - Command Set ‘A’
SMARTLINK
®
Commands Number: Name
Description of command purpose and usage
Command Set ‘A’
A-0: Enter Manual Positioning
Mode
Command A-0 is used to enter a Manual Positioning Mode that overrides the 4-20 mA, firing rate command input. If the numbered
lights flash momentarily after entering Command A-0, the command was not executed for one or more of the following reasons:
- The ADJUST switch may be in the MINIMUM position,
- The system is in Shutdown Mode, or
- The system may be "locked" to prevent tampering.
After entering Command A-0, the yellow manual light on the Control Interface will be ON. Once this command has been entered,
the INC/DEC switch can be used to change the firing rate. If the ADJUST switch is in the INDEX position, the INC/DEC switch is
used to move between the 19 electronic position "indexes". (See Reference Table 16, SMARTLINK™ MRV Commissioning
Sheet for the factory default valve positions for each index.)
If the ADJUST switch is in the ADJ position, pushing the INC/DEC switch up or down changes the firing rate in 1.0% steps. If the
INC/DEC switch is held in the up or down position, the firing rate will change until 0 or 100% is reached.
Note: This command should not be executed when the system is part of an operating process that requires continuous, closed-
loop temperature control.
A-1: Display Alarm Codes
After entering Command A-1, the INC/DEC switch is used to scroll through all current alarm conditions. If the red alarm ("ALM")
light on the Control Interface is off, no alarm conditions exist. (See page 10-30.7-66 for troubleshooting and alarm descriptions)
A-2: Enter Valve Position Setup
Mode
Command A-2 is used to enter the Position Setup Mode for modifying the 22-position profile. If the numbered lights flash momen-
tarily after entering A-2, the command was not executed for one or more of the following reasons:
- The ADJUST switch may be in the MINIMUM position,
- The system is in Shutdown Mode, or
- The system may be "locked" to prevent tampering
After entering Command A-2, both the yellow manual light and green run light will be flashing along with 1 or 2 of the numbered
lights that are used to indicate the valve's position index. The flashing lights indicate that one of the 22 position indexes can now
be modified using the INC/DEC switch. (For example, if the #1 and #2 light are flashing, position index 1.5 can be adjusted.)
When the ADJUST switch is in the INDEX position, the INC/DEC switch is used to select the position index to be modified. Each
INC or DEC switch entry, changes the position index in 0.5 steps. With the ADJUST switch in the ADJ position, pushing the INC/
DEC switch up or down changes the position of the "selected" valve in 0.1-degree steps. (A valve is "selected" by using Com-
mand A-3, Display/Change Selected Valve). If the INC/DEC switch is held in the up or down position for more than 3 seconds, the
valve position is changed in 0.5 degree steps. After moving the valve to the desired position, the Enter button must be pressed to
save the position setting. When the Enter button is pressed, the blinking position index lights (0-9) and command set light 'a' will
momentarily turn off. (See pages 10-30.7-61 through -63 for a complete description of the commissioning procedure.)
In the Position Setup Mode a maximum movement of 8 degrees from the stored position is permitted. When the 8 degree limit or
the min/max travel of the valve is reached, all of the position index lights will momentarily flash on.
A-3: Display / Change Selected
Valve
Command A-3 displays or changes the "selected" valve for adjustment, system commissioning, or valve diagnostics. If the num-
bered lights flash momentarily after entering A-3, the command was not executed because the ADJUST switch may be in the
MINIMUM position or the system may be "locked" to prevent tampering.
After entering Command A-3, the numbered light of the selected valve (0, 1, 2, or 3) will be turned ON solid. The INC/DEC switch
is then used to change the selected valve. After pressing the INC/DEC switch until the desired valve number is turned ON, press
Enter to save the new selection. When the Enter button is pressed, the selected valve number and command set light 'a' will
momentarily turn off indicating the new selection has been saved.