VICI Valve actuators: Microelectric Two position User Manual

Page 5

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5

With the software-settable device “ID” feature enabled, the serial port output (transmit line) of the
actuator is disabled (high impedance). Thus, as many as ten actuators can be controlled from a single
host serial port for a temporary multidrop application. For permanent multidrop applications, the
RS-485 option is the factory-recomended solution. The table above describes and explains all the
commands available.

Using the Device ID Feature

Actuators are shipped from the factory with this feature disabled. When it’s enabled, the actuator
responds only to commands which begin with the correct ID prefix, allowing up to 10 actuators to be
controlled from one serial port. A single command can be broadcast to all actuators by using an
asterisk (*) as the command prefix.

Note: Any broadcast command which elicits a response from the

serial port (such as *VR or *ID1) will receive a combined and unintelligible response.

Serial Commands

CP<enter>

Displays the current actuator position

CW<enter>

Sends the actuator to Position A

CC<enter>

Sends the actuator to Position B

GOn<enter>

Sends the actuator to Position n, where n is A or B

TO<enter>

Toggles the actuator to the opposite position

TT<enter>

Toggles the actuator to the opposite position, waits a preset

delay time, then rotates back to the original position.

ID<enter>

Displays the current device ID setting

IDn<enter>

Sets the device ID to value n, from 0 to 9

NOTE: When the ID feature is enabled, all commands

to the device must be prefaced by the ID number.

Entering ID* disables this feature (discussed below.)

ID*<enter>

Clears the ID variable

SB<enter>

Displays the current baud rate

SBnnnn<enter>

Sets the baud rate to 1200, 2400, 4800, 9600 (default), 14400,

19200, 28800, or 38400. The parity setting, number of data

bits, and number of stop bits cannot be changed. (See

section entitled Setting a New Baud Rate on the next page)

SOnnnn<enter>

Turns off the position outputs after a delay, set in milliseconds

to the closest 5 ms interval, from 0 to 30,000 ms. The outputs

are always on (SO=0) by default.

SM<enter>

Displays the current digital input mode (See section entitled

Digital Control of the Actuator, subhead Input Modes)

SMn<enter>

Sets the digital input mode to Mode n, where n is 1 or 2

DT<enter>

Displays the current delay time in milliseconds

DTn<enter>

Sets the delay time from 0 to 65,000 milliseconds

NOTE: The total delay time equals n = 2 milliseconds

VR<enter>

Displays the part number and date of the firmware

/?<enter>

Displays list of valid commands

IN<enter>

Starts a re-inialization sequence

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