Leuze electronic MSI 400 Series Manual page 21

Bit 7
Byte 3 Q4 Stuck-
at low
0: Stuck-
at error
1: no
stuck-at
Module state bits of the MSI-EM-IO84NP I/O module
The module state bits have the following meaning if not otherwise indicated; normally only the first byte of
the total state is transmitted:
0 = error
1 = no error or reserved
Tab. 3.8: Meaning of the module state bits of the MSI-EM-IO84NP expansion module
Bit 7
Byte 0 Reserved Reserved Power
Byte 1 Module
state out-
put data
Byte 2 Reserved
Byte 3 Reserved
Module state bit of the gateways
The module state bits have the following meaning if not otherwise indicated; normally only the first byte of
the total state is transmitted:
0 = error
1 = no error
Tab. 3.9: Meaning of gateway module state bits
Byte 0
Byte 1
Byte 2
Byte 3
Example
Module 2 (MSI-EM-IO84) has a short-circuit after high (24 V) at output 3. The following module state is
transmitted to the network (only the first 20 of 60 bytes are shown):
Byte address
Byte
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Bit 6 Bit 5
Q4 Stuck- Q3 Stuck-
at high at low
0: Stuck- 0: Stuck-
at error at error
1: no 1: no
stuck-at stuck-at
Bit 6 Bit 5
supply
Y1-Y4
and IY5-
IY8
Module Reserved Reserved Reserved Reserved Reserved Reserved
state input
data
Bit 7 Bit 6 Bit 5
Reserved Module Module
state out- state in-
put data put data
00 01 02 03
... 11
3 2 1 1 0
0 ... 11
Bit 4 Bit 3
Q3 Stuck- Q2 Stuck-
at high at low
0: Stuck- 0: Stuck-
at error at error
1: no 1: no
stuck-at stuck-at
Bit 4 Bit 3
Configur- Not used
ation state (error his-
tory flag)
Bit 4 Bit 3
Configur- Not used
ation (error his-
state tory flag)
Reserved
Reserved
Reserved
04 05 06 07
12 13 14 15
3 0 2 1 1 2 0 3
MSI 400
Product description
Bit 2 Bit 1
Q2 Stuck- Q1 Stuck-
at high at low
0: Stuck- 0: Stuck-
at error at error
1: no 1: no
stuck-at stuck-at
Bit 2 Bit 1
External Internal
module module
state state
Bit 2 Bit 1
Reserved Internal
module
state
08 09 10
16 17 18
3 0 2 1 2
1
Bit 0
Q1 Stuck-
at high
0: Stuck-
at error
1: no
stuck-at
Bit 0
Not used
("execut-
ing state")
Bit 0
Not used
("execut-
ing
state")
11 ...
19
0 3 ...
21