Siemens Simotion TM 121C

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Procedural functions of press brakes

SIMOTION Safety Unit (AP) - Edition 06.2003

7-57

7.5.4 Valve control

Figure 7-5 Valve control, part 1

The valve control can be implemented in accordance with performance

requirements.

A maximum of 3 valve pairs can be controlled. For the switching variant on the left,

the maximum possible output current is doubled (with equal loading of both the P

and M switches).

Figure 7-6 Valve control, part 2

One of two valve control variants can be selected:

• Variant 1

Here the press safety valve and valve 1 (or valve pair 1) are controlled for the

slow downward movement. All 3 valves (or valve pairs) are controlled for the

fast downward movement.

• Variant 2

Here the press safety valve and valve 1 (or valve pair 1) are controlled for the

slow downward movement. The press safety valve and valve 2 (or valve pair 2)

are controlled for the fast downward movement.

For this variant, it can optionally be specified whether valve 1 (slow movement)

is to remain controlled after activation. The control is reset as soon as a safety

device "responds", the "fast" request is set, the upward movement is initiated

or the operating mode is changed.

Siemens Simotion TM 121C - Valve Control