您说的是不是这种实现方式：Example 1 of a Broadcast Telegram
The host system wants to give the same Main Reference Value 'REF1.' to all drives connected to the bus via a Broadcast Telegram. All other PROCESS DATA of the telegram should be ignored by the drives.

In this case the host system has to transmit the following information in the BROADCAST ENABLE ARRAY:
Word a = 0000 0000 0000 0101 (Broadcast Flag set and PROCESS DATA WORD 2 enabled)
Words b to d = 0000 0000 0000 0000
但这种方式不能用于我想实现的功能，因为有两个是收放卷，线速度随卷径而变化。我搞不清协议说明中提到的第二个例子要怎样传送PZD？
Example 2 of a Broadcast Telegram:
The host system wants to start the ramp generators of all drives connected to the bus simultaneously via one Broadcast Telegram. All other PROCESS DATA must not be processed by the drives.
According to the PROFIBUS Profile (Lit [2]) the ramp generator can be enabled by setting bit 5 of COMMAND
WORD 1 to a "1" value.

In this case the host system has to transmit the following information in the BROADCAST ENABLE ARRAY:
Word a = 0000 0000 0000 0011 (Broadcast Flag set and PROCESS DATA WORD 1(= COMMAND WORD 1)
enabled)
Word b = 0000 0000 0010 0000 (Command Bit 5 enabled)
Words c to d = 0000 0000 0000 0000