Lectrosonics UDR200b User Manual download pdf (Page 20)

LecNet SOFTWARE PROTOCOL

Two Byte Format for Data sent from Host

When the host must send data to a LecNet device whose

value exceeds 127, the data must be broken into two succes-

sive bytes. This avoids having other LecNet devices interpret

the host data as an address, since the address space is 128-

254. If the host must send a data value that exceeds 127, two

bytes are output such that the first byte is the lower 7 bits of

the 8 bit value. The second byte is 1 if the original data value

is greater than 127, and 0 otherwise.

UDR200B Serial Commands

The following is a listing of available commands grouped

based on the UDR200B function to which the commands are

related. The word "Host" in the command descriptions means

the IBM PC, PC compatible, or other control system (like AMX

or Crestron) to which the UDR200B is connected. In any

commands where the host must send data to the UDR200B

whose value can legitimately exceed 127, refer to the Two Byte

Format guidelines above.

General Device Commands

Acknowledge - Causes the UDR200B sends its "name" string

back to the host.

Host sends command - 1

Host receives 7 data bytes: Byte 1 is the number of bytes

in the name string (7 for the UDR200B), followed by the

ASCII characters "UDR200B".

Change Device Address - Changes the UDR200B device

address and stores the new address in EEPROM.

Host sends command - 2

Host sends data byte: new device address, valid range

128 to 254.

Output Firmware Version - Outputs the version number of the

current firmware. For example, Version 1.0 software would be

returned as 10.

Host sends command - 25

Host receives data byte: firmware version.

Set Local/Remote Mode - Allows the Local/Remote status of

the UDR200B to be set. 0 is Local mode, 1 is Remote. The

Local/Remote setting is volatile, and the power-up default is

Local.

Host sends command - 30

Host sends data byte: Status data (0 or 1 as above)

Other Commands

Output Receiver Block Number - Outputs the block number

of the receiver.

Host sends command - 4

Host receives data byte: Block number 19 - 30

Output Current Receiver Frequency - Outputs the current

frequency of the receiver.

Host sends command - 6

Host receives data byte: Current frequency 0 - 255.

(note: the actual frequency may be calculated as:

block number x 25.6 MHz + current frequency

x .1 MHz)

Set Current Receiver Frequency - Allows the current fre-

quency for the receiver to be set. Also allows the option of

storing the new frequency in non-volatile memory. If the new

frequency is not stored, the receiver will revert to the last

saved frequency on next power up.

Host sends command - 5

Host sends two data bytes: Bytes 1 and 2: New fre-

quency, 0 - 255 Byte 3: 1 - Store new frequency in non-

volatile memory, 0 - no store.

Output Operational Status - Outputs the current opera-

tional status of the receiver.

Host sends command - 8

Host receives data byte: Status, 0 - 2. 0 - Hard Locked,

1- Unlocked, 2 - Locked.

Set Operational Status - Allows the current operational status

of the receiver to be set. The new status value is stored in

non-volatile memory.

Host sends command - 7

Host sends data byte: Status, 0 - 2. 0 - Hard Locked, 1 -

Unlocked, 2 - Locked.

Output Current Group Number - Outputs the current group

number of the receiver.

Host sends command - 10

Host receives data byte: Group number, 1 - 4.

Set Current Group Number - Allows the current group num-

ber of the receiver to be set. The new group number is stored

in non-volatile memory.

Host sends command - 9

Host sends data byte: Group number, 1 - 4.

Output Number of Group Entries in a Specified Group -

Outputs the number of name/frequency entries in a specified

group stored in non-volatile memory.

Host sends command - 16

Host sends data byte: Group (1 - 4) for which the number

of entries is desired.

Host receives data byte: Number of entries, 0 - 16. 0

entries means the group is currently unused.

Set Number of Group Entries in a Specified Group - Allows

the number of name/frequency entries to be set. The new

number is stored in non-volatile memory.

Host sends command - 15

Host sends data bytes: Byte 1: Group number, 1 - 4.

Byte 2: Number of entries in the group, 0 - 16.

1 2 ... 15 16 17 18 19 20 21 22

Comments to this Manuals

No comments

Lectrosonics UDR200b User Manual Page 20

Comments to this Manuals

Related products and manuals for Equipment Lectrosonics UDR200b