Horner APG XL4 OCS HE-ETN300 - Manual (Page 74)

CH.11 SUP0740-07
11/30/2009 Page 74 of 98 # 958
¾ For BOOL formatting (see next section), a bit number can be appended to 16-bit register
references (%R, %AI and %AQ). For example, reg–R11.3 references bit 3 of register %R11.
Valid bit numbers are 1 through 16.
11.5.2.2
FMT PARAMETER – OCS REGISTER READ FORMAT
Examples:
fmt–BOOL
fmt–BOOL–ON–OFF
fmt–BOOL–YES–NO
fmt–BIN
fmt–HEX
fmt–INT
fmt–UINT
fmt–DINT
fmt–UDINT
fmt–REAL
fmt–REAL–E
fmt–ASCII–10
fmt–IPADR
The required fmt parameter is followed by a dash and a display format type. Valid format types
are BOOL, BIN, HEX, INT, UINT, DINT, UDINT, REAL, ASCII and IPADR. Three of these format
types (BOOL, REAL and ASCII) have optional or required modifiers as follows:
The BOOL format reads and displays a single bit, and two optional modifiers indicate the text to
display for the bit’s logical On and Off states. The text "TRUE" and "FALSE" will be displayed if
the modifiers are omitted. In other words, fmt–BOOL is equivalent to fmt–BOOL–TRUE–FALSE.
The REAL format reads a 32-bit floating-point value, and the optional –E modifier can be used to
display data in exponential (scientific) notation. The fmt–REAL format displays a variable number
of digits to the left of the decimal point and 6 digits to the right of the decimal point (e.g. –
12345.000000). On the other hand, the fmt–REAL–E format only shows 1 digit to the left of the
decimal point and shows 6 digits to the right of the decimal point followed by a 4-character power
of 10 (e.g. –1.234500E+04).
The ASCII format accesses a string of ASCII characters, and a string size modifier from –1 to –31
is required, indicating how many ASCII characters to read and display. For example, the fmt–
ASCII–10 format reads and displays a string of 10 ASCII characters.
11.5.2.3
RFS PARAMETER – OCS REGISTER READ AUTO-REFRESH
Example: rfs–2
The optional rfs parameter specifies how often the <iframe> should automatically refresh the data
on the browser screen. For example, rfs–2 will cause the data to be refreshed every 2 seconds.
The number of seconds specified can range from 0 to the limits of the browser. A refresh time of
0 will refresh the data as often as possible, but this is not recommended because of the volume of
Ethernet traffic it can create. If the optional rfs parameter is omitted, the data will only be
refreshed when the user manually refreshes their web browser screen.
The rfs parameter uses a technique called “client-pull” to tell the web browser to do the periodic
refresh. It should be noted that not all web browsers support “client pull” and those that do
support it can usually be configured to disable it for security purposes.