Fail-Safe Function Block F_Sbr_Monitor; Introduction; Connections; Inputs - Siemens Simatic Manual

Fail-safe function blocks for storage and retrieval machines

3.7 Fail-safe function block F_SBR_MONITOR

3.7.1

Introduction

Fail-safe function block F_SBR_MONITOR monitors to ensure that the braking ramp is maintained. If
the velocity is not reduced to the down ramp parameterized in the drive, e.g. after SS1 is initiated, then
the block provides a signal to initiate STO or to close the brake.
Note
When using this block, block F_BO_W/BO_W (FC 176) must be available in the
block folder. It is not permissible that this is renumbered!
3.7.2

Connections

All bool variables listed in the following tables are preassigned FALSE, all integer variables are preas-
signed 0 – and all word variables preassigned W#16#0.
3.7.2.1

Inputs

Name
T_SAMPLE
T_RAMP
V_MAX
S7-Distributed Safety/SIMATIC Safety - fail-safe function blocks for storage and retrieval machines
Data type Description
Sampling time [ms]
The block sampling time, i.e. the interval in which the
Int safety program is called (cyclic interrupt OB interval for
F-CALL block) is parameterized here in ms
T_SAMPLE > 0
Ramp-down time [ms]
Here, the identical value in ms for the ramp-down time
from maximum velocity down to standstill is parameter-
Int
ized in the drive. In conjunction with V_MAX, the gradient
of the down ramp is a calculated from this value.
T_RAMP >= 0
Max. permissible velocity [SLU/mm]
The identical value for the maximum operating velocity
Int as in the drive is parameterized here. In conjunction with
T_RAMP, the gradient of the down ramp is a calculated
from this value.
- 3-38 -