CY325 ETC, CY325 Datasheet - Page 21
CY325
Manufacturer Part Number
CY325
Description
Stepper System Controller
Manufacturer
ETC
Datasheet
1.CY325.pdf
(107 pages)
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The CY545 supports several different command formats, which can be split into two major
categories, ASCII format and Binary format. Most examples in this manual will illustrate ASCII
formats, and we believe this will be the most popular mode of operation. The main advantage to
Binary format is a savings in the number of characters needed to represent a parameter value,
so Binary format commands will usually take fewer characters than ASCII format commands.
However, Binary format commands are more difficult for humans to read, and if the CY545 and
host computer become unsynchronized in Binary mode, due to a faulty data count, it is
extremely difficult to resynchronize the two without a hardware reset.
ASCII format commands all start with the ASCII command letter that selects that command. If
the command also has parameters, the command letter must be followed by a space, then the
parameter value. Multiple parameters, such as those used by the Loop command, may be
separated by a space or comma. Our examples will generally use a comma. All ASCII
commands end with the ASCII carriage return character, shown as “<cr>” in the following
examples. Commands without parameters, such as the Go command, use only the command
letter, followed immediately by the carriage return. For example:
Commands with parameters may use two formats for the parameter values in the ASCII mode,
a decimal format, consisting of the digits 0 to 9, or a hex format, consisting of the digits 0 to 9,
letters A to F, and an “H” suffix. Hex parameters must start with a digit. For example:
Parameter values may be entered with any number of digits, but the command will limit the
value to a single byte if the range of the parameter is only one byte. For example:
Sixteen bit parameters are limited to 65535 (0FFFFH), and eight bit parameters are limited to
255 (0FFH), while the 24 bit parameters, used for position and step counts, are limited to
16777215 (0FFFFFFH). All arguments are unsigned integers.
© 2002 Cybernetic Micro Systems
G<cr>
I<cr>
R 135<cr>
R 87H<cr>
R ABH<cr>
R 0AB<cr>
R 0ABH<cr>
D 12345<cr>
D 1A3BH<cr>
L 37,27<cr>
L 23H,27<cr>
R 0ABCH<cr>
R 350<cr>
Go command, no parameter
Initialize command, no parameter
Value is taken as 94 = 350 - 256
ASCII Command Format
Same parameter value, but in hex form
Parameter value ok
16 bit parameter value in decimal
Loop command, multiple parameters
Rate command, single decimal parameter
Illegal parameter, no digit to start
Illegal parameter, no H suffix
16 bit parameter value in hex
Parameter formats may be mixed
Value is taken as 0BCH = 188
Command Formats
16
Chapter 4 - Command Summary
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