Toshiba GR-200-5 Instruction Manual page 679

Threshold level
To sense an input signal securely, a potential divider is provided at the front circuit. If input
level is greater than a pick-up threshold, BI circuit will generate a detection signal. The
sensitivity can be adjusted with settings [BITH1], [BITH2] and [BITH]. Note the settings are
different and depending on BI circuits, as shown in Table 5.6-3.
Table 5.6-3 Threshold settings on IO slots
BIO modules Relevant circuits
BI1 and BI2
MV-BI1
BI3 through BI15
BI1 and BI2
IO#1 MV-BI3
BI3 through BI11
BI1 and BI2
MV-BI4
BI3 through BI10
IO#2
BI1 and BI8
MV-BIO1
IO#3
BI1 and BI8
MV-BIO1
The symbols A, B, C and D mean the threshold voltages, and the voltage values differ
depending on the DC rated voltage as shown in Table 5.6-4.
Table 5.6-4 Threshold voltages that the symbols mean
Symbol
A
B
C
D
Filter
Figure 5.6-10 illustrates the feature. It can neglect contact chattering. Period 't' illustrates to
neglect the chattering; a counting number should be set for the [CMP_NUM]:
The setting [CMP_NUM] is the common to all inputs.
Detected signal on BI
circuit
Figure 5.6-10 Chattering countermeasure (e.g. [CMP_NUM] = 4)
Settings
[BITH1]
[BITH2]
[BITH1]
[BITH2]
[BITH1]
[BITH2]
[BITH]
[BITH]
Threshold voltage
110-250Vdc
55Vdc
110Vdc
125Vdc
220Vdc
[ CPM_NUM ] ×
System⁡Frequency×12
Actual input signal
- 659 -
Selected items and the threshold voltages
Level_11(A), Level_12(B),
Level_21(B), Level_22(C),
Level_12
Level_11(A),
Level_13
Level_21
(B),
Level_22
Level_12
Level_11(A),
Level_13
Level_21
(B),
Level_22
Level_1(B), Level_2(C),
Level_1(B), Level_2(C),
24-60Vdc
12Vdc
24Vdc
48Vdc
60Vdc
1
t
6F2T0207 (0.01)
Level_13(C), Level_14(D)
Level_23(D)
(B),
Level_14(D)
Level_23(D)
(B),
Level_14(D)
Level_23(D)
Level_3(D)
Level_3(D)
GRE200 (5,6)