Siemens SIMATIC S5-115F - Operating System - Additional Tasks; Control Programs; Programmer Functions

System Overview S5-115F Manual
1.8.2 Operating System - Additional Tasks
The operating system of the S5-115F has the following additional tasks compared to those of the
S5-115U:
• Subunit synchronization
- Program synchronization
- Standardization of input data (necessary for path-identical processing of control programs)
- Standardization of user times (necessary for path-identical processing of control programs)
- Transfer of data from components connected at one end (e.g. PG 685, single-channel
SINEC L1 LAN, single-channel I/O modules) to the other subunit
• Component test
- Cyclical I/O module test with input signal discrepancy analysis
- SINEC L1 LAN test for every message
- Supplementary test of all function units such as processors, memory, parallel interface and
I/O modules
• Error analysis and error response for
- Subunit synchronization
- Component test
- CPU defects
- Erroneous programming, configuration and handling by the user
- System interrupts
1.8.3 Control Programs
The control program is fundamentally the same as a single-channel S5-115U program. A single
logic operation (e.g. AND input) referenced to an I/O address is all that is required to scan a
double-channel input. Similarly, an output operation referenced to an I/O address is used to
output a control command via a double-channel output. This is the basic facility. Beyond this, the
user must program the following:
• Standard synchronization function block FB 254 SYNC calls at intervals freely selectable by the
user, in order to enable
- Synchronous updating of user data
- Synchronization of time calls, process interrupts and SINEC L1 LAN traffic;
• Command sequence to increment the logical program counter after every 127 words
(maximum) of program code.
1.8.4 Programmer Functions
In addition to the programming functions of STEP 5 and startup support (e.g. with ”Status
display”) familiar from the S5-115U, the programmer can also be used for the following in the case
of the S5-115F:
• Safety parameter configuration for the operating system (monitoring times, structure of the
feedback module required for the I/O) including check display of the configuration data
• Error display in plaintext.
These additional functions are implemented using the COM 115F programming package, which
offers a modern forms-oriented operator interface.
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