II - DCE FEL ČVUT v Praze

SIMATIC S7 Ex Digital Modules
Channel groups
allocation
Parameters of the
digital output
module
2-20
Table 2-9 shows the allocation of the 4 channels to the 4 channel groups of
digital output.
Table 2-9 Allocation of the 4 channels to the 4 channel groups of
SM 322; DO 4 x 24V/10mA and SM 322; DO 4 x 15V/20mA
Channel Allocated channel group
Channel 0 Channel group 0
Channel 1 Channel group 1
Channel 2 Channel group 2
Channel 3 Channel group 3
Table 2-10 provides an overview of the parameters and shows what
parameters:
are static or dynamic,
can be used for the module as a whole or for a channel group.
Table 2-10 Parameter of SM 322; DO 4 x 24V/10mA and SM 322; DO 4 x 15V/20mA
Parameter SM 322; DO 4 x 24 V DC/10mA or SM 322; DO 4 x 15V/20mA
Value range Default Type Effective range
Basic settings
Diagnostic interrupt enable yes/no
no
dynamic Module
Retain last value
yes/no
no
dynamic Module
Switch to substitute value yes/no
yes
dynamic Module
Substitute value
0 / 1
0
dynamic Module
Diagnostics
Short to chassis ground
Wire break 1)
yes/no
no
static
Channel group
yes/no
no
static
Channel group
Supply voltage fault yes/no
no
static
Channel group
1) If wire break diagnostic enable is not parameterized, there will be no indication by the channel fault LED in the event
of wire break.
Diagnostics
Parameterizing
diagnostics
You can use the diagnostic function to determine whether signal output takes
place without errors.
The diagnostics is parameterized with STEP 7.
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04