Agilent Technologies TPS-mini 9699181, User Manual

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Technical Information
Window Protocol
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TPS-mini User Manual / 87-901-003-01 (E) 301/318
Communication Protocol
The communication protocol is a MASTER/SLAVE type where:
ƒ Host = MASTER
ƒ
Controller = SLAVE
The communication is performed in the following way:
1.
the host (MASTER) send a
M CRC
to the controller
(SLAVE);
2.
the controller answer with an
CRC
to the host.
The
MESSAGE
is a string with the following format:
<STX>+<ADDR>+<WIN>+<COM>+<DATA>+<ETX>+<CRC>
where:
NOTE
When a data is indicated between two quotes (‘...’) it means that the indicated
data is the corresponding ASCII character.
ƒ
<STX>
(Start of transmission) = 0x02
ƒ
<ADDR>
(Unit address) = 0x80 (for RS 232)
<ADDR>
(Unit address) = 0x80 + device number (0 to 31) (for RS
485)
ƒ
<WIN>
(Window) = a string of 3 numeric character indicating the
window number (from ‘000’ to ‘999’); for the meaning of each
window see the relevant paragraph.
ƒ
<COM>
(Command) = 0x30 to read the window, 0x31 to write into
the window
ƒ
<DATA>
= an alphanumeric ASCII string with the data to be
written into the window. In case of a reading command this field
is not present. The field length is variable according to the data
type as per the following table