Siemens has announced new firmware for the ET 200MP distributed I/O system and S7-1500 modules— firmware updates are necessary to use the new functionality offered with the FW1.5 for the S7-1500 CPUs.
- Submodule-granular Shared Device
- Module-internal Shared Input (MSI)
- Module-internal Shared Output (MSO)
- Configuration control (options handling)
Submodule granular shared device
This function enables an I/O module to be shared by up to four IO controllers. At present, the IM 155-5 PN ST supports two IO controllers. An IM that permits a distribution to up to four IO controllers is in preparation. This feature enables the use of I/O modules with many channels that are the distributed over several IO controllers. The latter can all be located in the same station. In the case of digital modules the assignment is on the basis of load groups, with analog modules it is on a channel basis. The logic assignment is to a so-called “submodule.” It is also possible to assign all these submodules to a single IO controller. In this case, the I/O addresses of the modules are not assigned on a block basis, but each Submodule can be assigned its own address.
The benefits of this new functionality include reduced cost due to saving of modules and IO-Devices; less space required in the switchboard due to saving of modules and IO-Devices; and free address assignment for flexible program creation.
Module internal shared input (MSI) & Module internal shared output (MSO)
MSI enables an input module to share its input data with up to four IO controllers. Each controller can make a read access to the same channels. When these modules are used together with the interface module IM 155-5 PN DP (6ES7 155-5 AA00-0AB0), up to two controllers are supported. In the case of a MSI configuration of an input module the input values of all channels are copied to a Basis Submodule (a main controller) and up to three additional MSI Submodules. The channels of the module are then available with identical input values in the Basis Submodule and the MSI Submodules. Each IO controller can make reading access to the same channels.
MSO enables an output module to share its output data with up to four IO controllers. One IO controller has write and read access. The other IO controllers can make a read access to the same channels. When these modules are used together with the interface module IM 155-5 PN DP (6ES7 155-5 AA00-0AB0), up to two controllers are supported. In the case of a MSO configuration of an output module the output values of all channels of the module are copied from a Basis Submodule (a main controller) into up to three additional MSO Submodules. The channels of the module are then available with identical values in the Basis Submodule and the MSO Submodules.
The benefits of MSI and MSO include simultaneous capturing of the I/O data of several CPUs; reduced costs due to saving of modules and IO-devices; less space required in the switchboard due to saving of modules and IO-devices; reduced communication load due to elimination of the CPU-CPU communication; and less programming work and simpler program upkeep due to elimination of the CPU-CPU communication.
Note: with MSI/MSO the value status (QI; Quality information) is always switched on. This means that all IO controllers are always informed if the main controller has failed. MSI and MSO cannot be employed together with the function “Isochronous Mode.”
Configuration Control (Options Handling)
Configuration control enables users to prepare their ET 200MP distributed I/O system for future expansions and alterations. Configuration control means that the planned maximum configuration is configured initially and can be flexibly modified later via the application program. This function addresses mainly series machine manufacturing where one machine is often manufactured in several different versions. The automation of these versions often only differs in the expansion of the distributed stations. Machine options can be retrofitted at a later date without special know how of the application program and without the engineering tool. The options are simply activated by enabling via a HMI, for example.
The benefits of configuration control include simpler program upkeep; lower costs (i.e., the customer initially only buys the expansion of the machine he currently requires, thus avoiding overhead and capital expenses); flexible retrofitting guarantees investment security and investment protection; and capital expenses are targeted precisely, as purchasing and enabling of the option package occurs at the time when the functionality is required.
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