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Hart Protocol DD files, Software Engineering

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I am working on DD development project and I am using 475 field communicator for testing DD. While development of DD, I tested DD with SDC 625 PC application using HART modem. I have found some difference in MENU display in both the cases.

I have implemented Burst mode in DD using HART Protocol Ver 7.0. I am using array indexing for 3 messages of burst mode. While testing with SDC 625 PC application, I am able to see all the burst variables along with their Labels as described in common practice command template. But when I am testing the same code with 475, there is no Label display. In place of error display, there is a label that “NO_LABEL_AVAiLABLE”.
Can you please guide me what am I missing in DD. I have attached the code also for reference.

MENU burst_menu_1
{
LABEL "Burst Message 1";
ITEMS
{
burst_messages[0].BURST_MODE_SELECT (DISPLAY_VALUE),
burst_messages[0].COMMAND_NUMBER (DISPLAY_VALUE),
burst_messages[0].UPDATE_PERIOD (DISPLAY_VALUE),
burst_messages[0].MAX_UPDATE_PERIOD (DISPLAY_VALUE),
burst_messages[0].BURST_TRIGGER_MODE (DISPLAY_VALUE),
burst_messages[0].BURST_CLASSIFICATION (DISPLAY_VALUE),
burst_messages[0].BURST_UNIT (DISPLAY_VALUE),
burst_messages[0].TRIGGER_LEVEL (DISPLAY_VALUE),
burst_vars2 // menu
}
}

MENU burst_vars2
{
LABEL "Burst Variables";
VALIDITY IF ( ( burst_messages[0].COMMAND_NUMBER == 33 ) ||
( burst_messages[0].COMMAND_NUMBER == 9 ) ) {TRUE;} ELSE {FALSE;}
ITEMS
{
burst_messages[0].BURST_VAR[0] (DISPLAY_VALUE),
burst_messages[0].BURST_VAR[1] (DISPLAY_VALUE),
burst_messages[0].BURST_VAR[2] (DISPLAY_VALUE),
burst_messages[0].BURST_VAR[3] (DISPLAY_VALUE),
burst_messages[0].BURST_VAR[4] (DISPLAY_VALUE),
burst_messages[0].BURST_VAR[5] (DISPLAY_VALUE),
burst_messages[0].BURST_VAR[6] (DISPLAY_VALUE),
burst_messages[0].BURST_VAR[7] (DISPLAY_VALUE)
}
}

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