Coils - Siemens SIMATIC S7-200 System Manual

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Output
The Output instruction (=) writes the new value for the
output bit to the process-image register. When the Output
instruction is executed, the S7-200 turns the output bit in the
process-image register on or off. For LAD and FBD, the
specified bit is set equal to power flow. For STL, the value
on the top of the stack is copied to the specified bit.
Output Immediate
The Output Immediate instruction (=I) writes the new value
to both the physical output and the corresponding
process-image register location when the instruction is
executed.
When the Output Immediate instruction is executed, the
physical output point (Bit) is immediately set equal to power
flow. For STL, the instruction immediately copies the value
on the top of the stack to the specified physical output bit
(STL). The "I" indicates an immediate reference; the new
value is written to both the physical output and the
corresponding process-image register location when the
instruction is executed. This differs from the non-immediate
references, which write the new value to the process-image
register only.
Set and Reset
The Set (S) and Reset (R) instructions set (turn on) or reset
(turn off) the specified number of points (N), starting at the
specified address (Bit). You can set or reset from 1 to 255
points.
If the Reset instruction specifies either a timer bit (T) or counter bit (C), the instruction resets the
timer or counter bit and clears the current value of the timer or counter.
Error conditions that set ENO = 0
H 0006 (indirect address)
H 0091 (operand out of range)
Set Immediate and Reset Immediate
The Set Immediate and Reset Immediate instructions immediately set (turn on) or immediately
reset (turn off) the number of points (N), starting at specified address (Bit). You can set or reset
from 1 to 128 points immediately.
The "I" indicates an immediate reference; when the instruction is executed, the new value is
written to both the physical output point and the corresponding process-image register location.
This differs from the non-immediate references, which write the new value to the process-image
register only.
Error conditions that set ENO = 0
H 0006 (indirect address)
H 0091 (operand out of range)
Table 6-4 Valid Operands for the Bit Logic Output Instructions
Inputs/Outputs
Bit
Bit (immediate)
N
Data Type Operands
BOOL I, Q, V, M, SM, S, T, C, L
BOOL Q
BYTE IB, QB, VB, MB, SMB, SB, LB, AC, *VD, *LD, *AC, Constant
S7-200 Instruction Set Chapter 6
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