Siemens SIMATIC S5 Equipment Manual

Programming Instructions
R 02/92
BEF = IS
BEF = IV
Inhibit interrupt
Inhibit interrupt for supplying the module with new setpoints
SPDB :
KY = x, y x = Disregard
w : Output unchanged, and/or
WI : Output unchanged (high word)
W2 ; Output unchanged (Iowword)
KB : Output of identifier bits, and/or
KB1 :
Output of identifier bits (high word) + channel 2
KB2 : Output of identifier bits (low word) + channel 1
ST
: Output control bits
Special function “inhibit interrupt BEF = IS” or “inhibit interrupt for supplying BEF = IV” is activated
by a one–time call and is deactivated again by another call.
The following table shows the assignment of the “ST parameter”.
76543210
SP 1ss Is –
S2 S1 12 11
Activation of the “inhibit interrupt for supplying BEF = IV” command is indicated when bit 6 of the
ST parameter is set. The “inhibit interrupt
BEF = IS” command has been activated when bit 5 and
bit 6 of the ST parameter are set. The module resets bit 5 and bit 6 when the interrupt inhibit is
deactivated.
The “read actual value
BEF = IW” command is used, for example, to provide current information
concerning the module status (ST parameter).
1P 241 Equipment Manual
@ Siemens AG 1989, Order No.: 6ES5 998-0KD21
9 – 25
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Siemens SIMATIC S5 Specifications

General

Product type designation	SIMATIC S5
Programming language	STEP 5
Digital inputs	Varies by model
Digital outputs	Varies by model
Analog inputs	Varies by model
Analog outputs	Varies by model
Supply voltage	24V DC
CPU Type	Varies by model
Memory	Varies by model
Digital I/O	Varies by model
Analog I/O	Varies by model
Communication	PROFIBUS
Operating Temperature	0°C to 60°C
Relative Humidity	5% to 95% (non-condensing)