ProSoft Technology 3170-MBS - Manual (Page 25)

3170-MBS ♦ Flex Platform Status Information
Modbus Slave Interface Module User Manual
ProSoft Technology, Inc. Page 25 of 55
October 27, 2010
5.2 Module Status Words

Slot Status: indicates the general health of the installed I/O module

Number of Words: either 3 or 15 words indeterminate if slot is empty.

Number of Read Words: the number of words which are to be read from the
I/O module, indeterminate if slot is empty.
Address
Bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 40122
Status Total
Words Read
Words Type
Identity to 40129

Type ID: a byte when combined with the Number of Words and Number of
Read Words form the Module ID which uniquely identifies a specific module
function, series and revision, indeterminate if slot is empty. Note that all of
bits 0 through 12 should be used in identifying a module.
Bit 15
1 = No answer, empty slot or dead module
Bit 14 1 = Either positive edge of bit 15 or bit 13 detected
Bit 13 1 = Bit failure, bad data on SerBus
Bit 12 1 = Number of words is 15, = 0 number of words is 3
Bits 11 to 8 Value = number of read words
Bits 7 to 0 Value = Type ID