Lenze Drive PLC Developer Studio 9300 Servo PLC (V8.x) Bedienungsanleitung PDF herunterladen (Seite 73)

9300 Servo PLC

System blocks

2.12 MCTRL_MotorControl (node number 131)

2−59

9300 Servo PLC EN 5.0

Function sequence

1. The TP is activated via a signal change at a digital input (X5/E1 ... E4) or via a zero pulse at the

incremental encoder input X8 or the resolver input X7.

2. If a TP has occurred, MCTRL_bActTPReceived_b is set = TRUE.

3. After the start of the task MCTRL_dnActIncLastScan_p indicates the number of increments

[inc/ms] counted since the TP.

4. Then MCTRL_bActTPReceived_b is set = FALSE.

Note!

 It is necessary that all three outputs (MCTRL_nNAct_v, MCTRL_bActTPReceived_b and

MCTRL_dnActIncLastScan_p) are processed in the task even if just one signal is required.

 For more detailed information about the use of the digital inputs X5/E1 ... E3 for touch probe,

please refer to the "Function library LenzeTpDrv.lib" Manual.

MCTRL_nNAct_v

 The value MCTRL_nNAct_v is scaled in increments per millisecond.

(INT) 16384 corresponds to 15000 rpm. See chapter 1.2.7, "Signal types and scalings".

(^ 1−8)

 For every task in which MCTRL_nNAct_v is used the operating system creates an individual

integrator that is reset after every start of the task (task−internal process image).

 For a safe TP generation, MCTRL_nNAct_v must not be used in the PLC_PRG.

Example (MCTRL_nNAct_v in a 10−ms task):

 When the 10−ms task starts, the value of the integrator is saved in a local area of the task and

the integrator is reset. The value in the local area gives an average value in increments per

1 ms.

 If a position value is to be derived from this value, then it must be multiplied by

SYSTEM_nTaskInter val / 4 to get the result in increments per

10 ms, as in the example.

Example: In a 1−ms task SYSTEM_nTaskInter val has the value 4 (4 x 0.250s = 1 ms)

 In the Lenze FBs this process is already implemented.

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Lenze Drive PLC Developer Studio 9300 Servo PLC (V8.x) Bedienungsanleitung Seite 73