Siemens SIMATIC S7-300 Manual page 186

Description of Functions
Module control
The following table lists the control signals used to start a movement.
Prerequisite:
Mode
Jogging (mode = 01) Velocity level
BP = 1 = level 1
BP = 2 = level 2
Open–loop control Frequency level
(mode = 02) BP = 1 = level 1
BP = 2 = level 2
Reference point ap- –
proach
(mode = 03)
Incremental relative BP = 1...100
(mode = 04) BP = 254
MDI (mode = 06) –
Automatic (mode = –
08)
Automatic single –
block (mode = 09)
9-10
It is only possible to start the movement when the start enable is set and
the enable input is set (if parameterized).
Enable Start is set if:
– No error occurred
– Mode is active
– No Stop is called
– Drive enable is set
A static Stop signal prevents all movements or block processing.
Response of the FM 354 to transition of the S7-300 CPU from RUN to
STOP state:
– As described for Restart (see Section 9.3.3)
– The digital outputs are switched off
– Interface to the user program is switched off
Response of the FM 354 to transition of the S7-300 CPU from STOP to
RUN state:
A cold restart of the module is executed.
Drive enable [AF] = 1, Stop [STP] = 0,
Start enable [SFG] = 1
Parameters Command /
Signal state
R+, R– / Level R+ or R– with "Level" = 1
R+, R– / Level R+ or R– with "Level" = 1
Start, R+, R– /
Edge
R+, R– / Edge
Start / Edge
Start / Edge
Start / Edge
Activation of movement
(R+ and R– simultaneously
(R+ and R– simultaneously
Direction as in MD
R+ or R– = 0/1 or Start = 0/1
(speed as in MD)
R+ = 0/1 or R = 0/1
(speed level 1)
Start = 0/1 (R+, R– relevant only for rotary
axis with absolute measure specified for direc-
tion selection)
Start = 0/1 (according to program presetting)
Start = 0/1
FM 354 Servo Drive Positioning Module
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