ProSoft Technology PLX3 Series User Manual page 120

MBTCP Protocol
User Manual
Preset Multiple Registers (Function Code 16)
Query
Holding registers existing within the controller can have their contents changed
by this message (a maximum of 60 registers). However, because the controller is
actively scanning, it also can alter the content of any holding register at any time.
The values are provided in binary up to the maximum capacity of the controller
(16-bit for the 184/384 and 584); unused high order bits must be set to zero.
Note: Function codes 5, 6, 15, and 16 are the only messages that will be recognized as valid for
broadcast.
Func Hi
Adr
Add
10 00
11
Response
The normal response to a function 16 query is to echo the address, function
code, starting address and number of registers to be loaded.
Func
Adr
10
11
Page 120 of 218
Lo Add Quantity Byte
Cnt
87 00 02 04
Hi Addr Lo Addr
00 87
Ethernet and Serial Gateways
Hi Lo Hi Lo Data Error Check
Data Data Data
00 0A 01 02
Quantity
00 02
ProSoft Technology, Inc.
PLX3x Series
Field
CRC
Error Check Field
56
May 26, 2016