8
E
Enter
Pressing the “E” key will lock in and store data that was entered or shown on
the display i.e., (set point, dead band, frequency, voltage pulse point while in
slow speed).
Pressing the “E” key three times in succession within a span of about 2
seconds will toggle the keypad between locked and active.
F
Auto/Manual
Pressing the “F” key while the instantaneous voltage mode is displayed will
toggle the selected phase between automatic and manual control modes. In
manual mode the “A” & “B” keys may be used to raise and lower the voltage
for the selected phase. If a phase is in manual mode, its instantaneous voltage
display will flash quickly.
ASCII COMMUNICATIONS
Communication with the FRM2000 series Variable Transformer Controller is a simple ASCII protocol with defined
commands and responses.
Communication Parameters:
9600 Baud, 8 Bits, No Parity, 1 Stop Bit
Message Format:
All commands and responses have the same general format. The format is as
follows:
STX ADDR CMD (DATA) ETX
STX
An ASCII start of text control character, 02 Hex, control B, (^B).
ADDR
A meter’s unique character identification (address). A single hexadecimal
character (0-9, A-F).
CMD
A two character command for which there is a defined response.
DATA
Information associated with the command, or response data as needed; some
commands require no DATA.
ETX
An ASCII end of text control character, 03 Hex, control C, (^C).
The command string to the PVC does not contain spaces. Spaces only appear for purposes of readability in the
document. Case sensitivity is not an issue.
READ/WRITE COMMANDS AND RESPONSES
RA (read address)
Cmd: STX 0
1
RA ETX
Rsp:
STX ADDR ETX
1
0 is the universal address to which all controllers respond.
WA (write address)
Cmd: STX ADDR WA X
2
ETX
Rsp:
STX WA ETX
2
X is a character 1-9 or A-F representing the unit address.
RC (read control)
Cmd: STX ADDR RC ETX
Rsp:
STX ADDR AA
3
BB
3
CC
3
F
4
Ø
5
S
6
XX
7
ETX
WC (write control)
Cmd: STX ADDR WC AA
3
BB
3
CC
3
F
4
Ø
5
S
6
XX
7
ETX
Rsp:
STX WC ETX
3
Two character per channel control code; The first or left most character is used to control the motor when in
manual mode. The letters L, R & O are used respectively to cause the motor to run in the lower voltage direction (L),
raise voltage direction (R) or off(O). The second character is either the letter A or M to put the channel in automatic
control mode (A) or manual control mode (M). The default control codes are motor off in manual mode. i.e. letters
OM
Summary of Contents for FRM2000-1
Page 4: ...4 OUTLINE...
Page 5: ...5 CONNECTIONS A B C D...
