Smoothing time = number of module cycles (k) x cycle time of the module.
The following figure shows after how many module cycles the smoothed analog value is
almost 100%, depending on the set smoothing. Is valid for each signal change at the analog
input.Enable a hardware interrupt at violation of high limit 1 or 2 or low limit 1 or 2.
Low limit 1 or 2
Specifies the low limit threshold that triggers hardware interrupt 1 or 2.
High limit 1 or 2
Specifies the high limit threshold that triggers hardware interrupt 1 or 2.You can use this parameter to determine the operating mode for the module.
● Fast mode; easy integration time with less frequency suppression (minimal integration
time 2.5 ms)
● Standard mode; triple integration time with higher frequency suppression (minimal
integration time 7.5 ms)
Measuring range adjustment
With this parameter, you disable or enable the measuring range adjustment function.
Measuring range adjustment high limit
With this parameter, you specify the high limit of the measuring range.
Measuring range adjustment low limit
With this parameter, you specify the low limit of the measuring range.
Scaled high nominal range limit
With this parameter, you set the desired display value (in REAL) for the high nominal range
limit of the measuring range.
Scaled low nominal range limit
With this parameter, you set the desired display value (in REAL) for the low nominal range
limit of the measuring range.The module can be configured differently in STEP 7; see following table. Depending on the
configuration, additional/different addresses are assigned in the process image of the inputs.
Configuration options of AI 8xU/I HF
You can configure the module with STEP 7 (TIA Portal) or with a GSD file.
When you configure the module by means of the GSD file, the configurations are available
under different abbreviations/module names.
The following configurations are possible:
1 x 8-channel without value status AI 8xU/I HF X X
1 x 8-channel with value status AI 8xU/I HF QI X X
8 x 1-channel without value status AI 8xU/I HF S X
(PROFINET IO only)
X
(PROFINET IO only)
8 x 1-channel with value status AI 8xU/I HF S QI X
(PROFINET IO only)
X
(PROFINET IO only)
1 x 8-channel with value status for moduleinternal
shared input with up to 4 submodules
AI 8xU/I HF MSI X
(PROFINET IO only)
X
(PROFINET IO only)
1 x 8-channel with value status for scaling

of measured values
AI 8xU/I HF Scale V14 or higher with HSP
0186
(PROFINET IO only)
X
(PROFINET IO only)
Value status (Quality Information, QI)
The value status is always activated for the following module names:
● AI 8xU/I HF QI
● AI 8xU/I HF S QI
● AI 8xU/I HF MSI
● AI 8xU/I HF Scale
An additional bit is assigned to each channel for the value status. The value status bit
indicates if the read in digital value is valid. (0 = value is incorrect). The figure below shows the address space assignment with the configuration as 1 x 8-
channel module. You can freely assign the start address for the module. The addresses of
the channels are derived from the start address.
"IB x" stands, for example, for the module start address input byte xAddress space for configuration as 1 x 8-channel AI 8xU/I HF with value statusFor the configuration as a 8 x 1-channel module, the channels of the module are divided into
multiple submodules. The submodules can be assigned to different IO controllers when the
module is used in a shared device.
The number of usable submodules is dependent on the interface module used. Observe the
information in the manual for the particular interface module.
Contrary to the 1 x 8-channel module configuration, each of the eight submodules has a
freely assignable start address.The channels 0 to 7 of the module are copied in up to four submodules with configuration 1 x
8-channel module (Module-internal shared input, MSI). Channels 0 to 7 are then available
with identical input values in different submodules. These submodules can be assigned to up
to four IO controllers when the module is used in a shared device. Each IO controller has
read access to the same channels.
The number of IO controllers depends on the interface module used. Please observe the
information in the manual for the particular interface module.
Value status (Quality Information, QI)
The meaning of the value status depends on the submodule on which it occurs.
For the 1st submodule (= basic submodule), the value status 0 indicates that the value is
incorrect.
For the 2nd to 4th submodule (=MSI submodule), the value status 0 indicates that the value
is incorrect or the basic submodule has not yet been configured (not ready)The figure below shows the address space assignment for configuration as a 1 x 8-channel
module for scaling (Scale) of the measured values. You can freely assign the start address
for the module. The addresses of the channels are derived from the start address.
"IB x" stands, for example, for the module start address input byte xYou can find information on the Shared Input/Output (MSI/MSO) function in the section
Module-Internal Shared Input/Output (MSI/MSO) of the PROFINET with STEP 7 V13 The figure below shows the LED displays (status and error displays)
of AI 8xU/I HF.The module starts and flashes until the valid
parameter assignment is set.
---
On Off
Module is configured.
On Flashes
Indicates module errors (at least one error at
one channel, e.g., wire break).
Evaluate the diagnostics data and eliminate the
error (e.g., wire break).
Flashes Flashes
Hardware defective. Replace the module.
PWR LED