Page 19
DIGIMAX
®
®
®
®
®
Manual
NOTE:
S
ERIAL
COMMUNICATIONS
REQUIRES
SOME
EXPERTISE
IN
THE
USE
OF
COMPUTERS
AND
/
OR
PROCESS
CONTROLS
. T
HE
COMMUNICATIONS
PROTOCOLS
IN
THE
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
®
CONFORM
TO
THE
ANSII
STANDARD
RS
-422
COMMUNICATIONS
SPECIFICA
-
TION
. T
HE
OPERATION
OF
THE
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
®
FROM
A
PERSONAL
COMPUTER
'
S
RS
-232
PORT
REQUIRES
A
DEVICE
TO
CHANGE
FROM
THE
RS
-232
SPECIFICATION
(
A
SINGLE
PORT
TO
SINGLE
PORT
SYSTEM
)
TO
THE
RS
-422
SYSTEM
(
A
MULTI
-
PORT
INDUSTRIAL
STANDARD
).
THESE
DEVICES
ARE
AVAILABLE
AS
EXTRA
COST
OPTIONS
FROM
POWER
TEC
.
#17
#17
#17
#17
#17 UNIT I.D.
UNIT I.D.
UNIT I.D.
UNIT I.D.
UNIT I.D.
When using the Binary protocol (see parameter#27), valid values are from 1 to 255.
When using one of the Allen Bradley protoccols, valid values are from 0 to 254. No unit
may have a value of 255, since that is the address used for general broadcast functions.
Each unit on an RS-422 link must have a unique I.D. The default I.D. number is 1.
Using 1 as one of the unit I.D. numbers may cause an addressing conflict if a unit
returns to its default values
, so it may be advisable to start the addresses number 2.
Entering an illegal address causes an error code 08. Press PGM/CLR to clear it.
This parameter may be changed while running, but consider the consequences on the
communications system.
#18
#18
#18
#18
#18 BAUD RATE
BAUD RATE
BAUD RATE
BAUD RATE
BAUD RATE
Set the Baud Rate for serial communications. Valid values are 3 (for 300 baud), 6 (for
600), 12 (for 1200), 24 (for 2400), 48 (for 4800) and 96 (for 9600).
After setting the baud rate, the serial communications of the host must be set to 8 data
bits, NO parity, and 1 stop bit (8-N-1). These settings in the
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
®
cannot be altered.
Entering an incorrect baud rate generates error code 10. Press PGM/CLR to clear it.
#19
#19
#19
#19
#19 LOCAL / REMOTE / KEYLOCK
LOCAL / REMOTE / KEYLOCK
LOCAL / REMOTE / KEYLOCK
LOCAL / REMOTE / KEYLOCK
LOCAL / REMOTE / KEYLOCK
Enter 0 for
LOCAL
(keypad) operation.
Enter 1 for
REMOTE
. The front panel LED will stay lit until LOCAL control is restored.
Enter 2 for
KEYLOCK
, which is LOCAL/REMOTE controlled through the parameters.
Any other number will generate error code 09. Press PGM/CLR to clear the error code.
TO RETURN TO LOCAL ONCE THE
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
DIGIMAX
®
IS IN KEYLOCK, YOU MUST
PRESS THE KEY SEQUENCE
[ALT] [CODE] [UP] [ENT]
TO RESTORE LOCAL CON-
TROL. The code may be either the operator or the maintenance access code.
This parameter may be changed while running.
#20
#20
#20
#20
#20 A TO D TRIM SETPOINT
A TO D TRIM SETPOINT
A TO D TRIM SETPOINT
A TO D TRIM SETPOINT
A TO D TRIM SETPOINT
This parameter sets the gain of the A to D input (TB2 terminals 17+ and 15-) when the
input is used as an analog trim input. When the analog input is 5 VDC, the trim is zero. The
voltage difference above or below 5 VDC (0 VDC min, 10 VDC max) is multiplied by 1/5th
of the number in parameter # 20 and added or subtracted to the SETPOINT.
Parameter #26 must be set to 1 to enable the AtoD input as a trim input.
#21
#21
#21
#21
#21 OPERATOR PASSWORD
OPERATOR PASSWORD
OPERATOR PASSWORD
OPERATOR PASSWORD
OPERATOR PASSWORD
This is the code given to the operator for access to the parameters. It may be any
number from 0 to 99999. The number may be from one to five digits, and leading zeroes do
not need to be entered. This parameter may be changed while the unit is running.
#22
#22
#22
#22
#22 A TO D LOW ENGINEERING UNITS
A TO D LOW ENGINEERING UNITS
A TO D LOW ENGINEERING UNITS
A TO D LOW ENGINEERING UNITS
A TO D LOW ENGINEERING UNITS
The input at terminals 15 (-) and 17 (+) on TB2 may range from 0 to +10 VDC. This
parameter sets, in engineering units, what the effect of the 0 VDC level will be.
This parameter may be changed while the unit is running.
