L3Harris narda PMM EP-600 User Manual page 91

6.1 Disclaimer
6.2 Protocol
Document EP60XEN-01122-3.16 – © NARDA 2020
6 - Communication protocol
This chapter provides the information required to control the PMM EP-
600/601/602/603/604 via the fiber optic connected to a PC and by means of
user's own PC software applications. Narda STS S.r.l supports the
correctness of the information only, and disclaim for any consequence the
use of such information may cause to anybody. The inclusion of Narda's
communication protocol into user's or third party software is entirely at the
user's risks and responsibility. In no way Narda STS S.r.l shall be liable for
damages of any kind consequent to the use of the information provided in
this chapter.
All the following examples are indifferently referred to the PMM EP-
600, EP-601, EP-602, EP-603 and EP-604.
The serial communication between PC and PMM EP-600/601/602/603/604
is the RS232 standard or USB (via the USB-RS232 converter).
Specifications:
•
Rate 9600 Baud
•
Start 1 bit
•
Stop 1 bit
•
No Parity
The commands are composed by an ASCII string delimited by "#" (0x23)
and "*" (0x2A)
Up to FW 1.02 each command must begin with the address which is made
of the string "00".
From FW 1.10 each command starts sending the address which is made of
two characters string in the range "00" to "99".
The address "00" is a special one as it is considered Broadcast while all
others must match the address stored in the unit (see command "I").
In other words the EP-600 will always grant all commands starting with
"#00" regardless its own address stored.
Broadcast mode is intended when using the EP-600 in a NON-BUS way,
typically PC directly linked to EP-600, or for setting the new address (see
command "I"). In this mode the address can be changed even without
knowing the current address.
Careful must be taken, however, when the EP-600 works on a BUS (for
example via SB10) as using the broadcast address all the device sharing
the BUS would answer at the same time creating thus a conflict.
Hereafter all example are made using the broadcast address but, of
course, they work also using different address. The only restriction is that
the address must be made of two characters and the range is "00" to "99"
The answer can be either in ASCII or Binary, according to the command
sent. The first character is always like the character sent, and can be used
as control marker or synchronization for the answer.
Communication protocol 6-1