section Parameter assignment (Page 36)Defines the limit channel-by-channel. If this value is exceeded, the "Limit value warning"
maintenance interrupt is signaled.
Enter an integer value between 0 and 16777214. Refer to the data sheet of the connected
actuator. We recommend that you do not enter this maximum value, but instead set it to 80%
or 90%, for example, so that you have enough time to replace the actuator as a preventive
measureThe 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
outputs/inputs.
Configuration options of DQ 16x24VDC/0.5A 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:f the system is in shared device mode and one of the IO controllers involved goes into
STOP or fails due to a communication failure, for example, all submodules of the output
module perform the configured substitute value reaction (e.g. shutdown).
This means that even when only one IO controller fails, the other IO controllers associated
with the shared device no longer control the assigned submodule of the output module.The value status is always activated for the following module names:
● DQ 16x24VDC/0.5A HF QI
● DQ 16x24VDC/0.5A HF S QI
● DQ 16x24VDC/0.5A HF MSO
An additional bit is assigned to each channel for the value status. The bit for the value status
indicates if the output value specified by the user program is actually pending at the module
terminal (0 = value is incorrect).
Note
The maintenance interrupt "Limit value warning" has no effect on the value status.
Address space for configuration as 16-channel DQ 16x24VDC/0.5A HF
The following figure shows the assignment of the address space for the configuration as a
16-channel module with value status. You can freely assign the start address for the module.
The addresses of the channels are derived from the start address.
The letters "a to d" are printed onto the module. "QB a" stands for module start address
output byte a.For the configuration as a 2 x 8-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 IO controllers depends on the interface module used. Please observe the
information in the manual for the particular interface module.
Contrary to the 1 x 16-channel module configuration, each of the two submodules has a
freely assignable start address. The addresses for the respective value status of a
submodule can also be assigned by the user.For the configuration as a 1 x 16-channel module (module-internal shared output, MSO),
channels 0 to 15 of the module are copied to multiple submodules. Channels 0 to 15 are
then available with identical values in various submodules. These submodules can be
assigned to up to four IO controllers when the module is used in a shared device:
● The IO controller to which submodule 1 is assigned has write access to outputs 0 to 15.
● The IO controllers to which submodule 2, 3, or 4 is assigned have read access to outputs