Young Meteorological Translator Model 26800 - Manual (Page 10)

Page 9
26800-90(K)
STANDARD DEVIATION calculates the standard deviation
of samples from SLOC and stores the result in DLOC. #SAMP
defines the number of samples for MOVING type only.
BLOCK type adds new values with each instruction iteration.
When FLAG 1 is ON, the standard deviation is calculated. The
process begins again when FLAG 1 is OFF.
MOVING type keeps a list of every sample. After #SAMP
samples have been collected, the first standard deviation is
calculated. After that, a new standard deviation is calculated for
each new sample acquired. Each MOVING standard deviation
instruction automatically allocates the needed internal memory.
If memory limits are reached and PGM ERR HANDLE is set to
STOP, an error message will appear.
ANGLE types internally convert unit vector angles to Cartesian
values which are used for the actual calculation. Internal Car-
tesian standard deviations are converted back to angles for the
final result. MOVING ANGLE employs the Yamartino algorithm.
sloc= Source location
dloc= Destination location
type= BLOCK, BLK ANGLE, MOVING, MOV ANGLE
#samp= Number of samples (0001-1750)
WIND DIRECTION 0-540 converts 0-360° wind direction in
SLOC (degrees) to a 0-540° range stored in DLOC. When used
to produce an analog output, the 0-540° range helps prevent
chart "painting" or excessive zero-to-full-scale excursions when
the wind direction oscillates about the 0/360° transition.
sloc= Source location (001-256)
dloc= Destination location (001-256)
5.0 SERIAL COMMUNICATION
The 26800 includes two independent serial communication chan-
nels: COM1 and COM2. COM1 may be set to operate as either an
RS-232 or RS-485 port. Baud rates for either channel may be set
to any of several common values between 1200 and 230.4K baud.
Format is 8 bits data, 1 stop, no parity. No handshaking is used.
Either serial channel may be controlled by the USER PROGRAM
for input or output using INPUT SERIAL and SERIAL BUFFER
instructions.
The USB port is dedicated to communication with RMYComm, the
included Windows PC program used to manage setup parameters,
static screen text, the user program, and recorded data.
6.0 ERROR MESSAGES
When an error occurs during OPERATE MODE and PGM ERR
HANDLE is set to STOP, the 26800 generates an error message
and takes the user to the offending instructions with an option to
edit.
1 DIVIDE BY 0 ERROR IN INSTR N
Zero value in temporary storage instruction LOC used as a
divisor in this instruction.
2 INVALID ARGUMENT IN INSTR N
Serial input string is invalid or screen number in temporary
storage location is invalid.
3 BUFFER OVERRUN ERROR IN INSTR N
Auto-incrementing index for serial output has exceeded
64-character buffer length limit.
Declaration of Conformity
R. M. Young Company
2801 Aero Park Drive
Traverse City, MI 49686 USA
Model 26800 Meteorological Display
The undersigned declares on behalf of R. M. Young
Company that the above-referenced product conforms
with the provisions of:
Council Directive 2004/108/EC (December 15, 2004)
on Electromagnetic Compatibility;
David Poinsett
R & D Manager
4 END-IF WITHOUT IF ERROR IN INSTR N
Each END-IF must be preceded by a matching IF statement.
5 ELSE WITHOUT IF ERROR IN INSTRUCTION N
Each ELSE statement must be preceded by a matching IF
statement.
6 CORRUPT USER PROGRAM IN INSTR N
Reload the user program.
7 TIMEOUT IN INSTRUCTION N
Determine cause. Increase PGM INTERVAL and/or TIMEOUT
INTERVAL if needed.
8 UNKNOWN ERROR IN INSTRUCTION N
Review USER PROGRAM.
7.0 WARRANTY
This product is warranted to be free of defects in materials and
construction for a period of 12 months from date of initial purchase.
Liability is limited to repair or replacement of defective item. A copy
of the warranty policy may be obtained from R. M. Young Com-
pany.
8.0 CE COMPLIANCE
This product complies with European CE requirements for the
EMC Directive (see Declaration of Conformity below). Please
note that shielded cable and Model 26860 RF Suppression Kit (or
equivalent) must be used.