CD600 Plus - User's Manual
4.14
If CH1 is in position "0" (equivalent to Automatic), the letter M will blink faster than when in Forced
Manual and the signal at the output will be the same signal of input B.
The position of switch CH1 after input C returning to a low logic level is determined by parameter
CSA1, with the following options: last position, position "1" and position "0". This may imply in
Manual or Automatic operation if input D is with low logic level.
Other features may be added to this mode. For further information, see description of parameters
CCH1, CST1, CLAM and CLMV.
INPUT B CONNECTED
INPUTS SWITCHES LED M
C D CH3 CH1 CH2
OUTPUT
0 0 0 0 0 INPUT A UNLIT
0 0 0 1 0 INTERNAL REGISTER LIT
1 0 1 0 0 INPUT B FAST FLASH
1 0 1 1 0 INTERNAL REGISTER LIT
0 1 0 0 1 INTERNAL REGISTER SLOW FLASH
0 1 0 1 1 INTERNAL REGISTER LIT
1 1 1 0 1 INTERNAL REGISTER SLOW FLASH
1 1 1 1 1 INTERNAL REGISTER LIT
Table 4.8.1 - Truth table
Observe that the parameters CCHI, CST1 and CSA1 can affect the CH1 position in function of the
input C and/or D status independent of the A/M key. Although, configuration of those parameters
can automatically alter the table line, as it can suppress some lines.
CCH1 - ACTUATION OF CH1
This parameter determines if switch CH1 will be actuated only by the front panel or with CH2 and/or
CH3, or if it will be locked in "0" (AUTO) or in "1" (MANUAL).
CH1 is actuated simultaneously with CH2 or CH3 when inputs C or D, have high logic level. CH1
position, when actuated by CH2 and/or CH3 is described in parameter CST1. The position of CH1,
when CH3 returns to position "0", is defined in parameter CSA1.
CST1 - POSITION OF CH1 WITH CH2 AND CH3 ACTUATED
This parameter determines CH1 position when inputs C or D are with high logic level and parameter
CCH1 is programmed with 3, 4 or 5.
When input C returns to logic level "0", switch CH1 will take the position determined by parameter
CSA1. After CH1 is actuated by input D, it may be free to be actuated by the <A/M> key since this is
not locked (parameter CLAM=1 or 3). CH1 position when input D returns to a low logic level will be
the position of CH1 just before CH2 switching.
Such position is indicated on the front panel as follows:
- "M" blinking: CH1 in position "0" (equivalent to automatic when CH2 returns to position "0").
- "M" continuously lit: CH1 in position "1" (equivalent to Manual).
CLAM - LOCKS A/M KEY
This parameter locks the front panel <A/M> key, thus preventing the actuation of switch CH1 when
inputs C and/or D have high logic level.
This feature prevents the operator from actuating the <A/M> key during situations of "safety output" or
"forced manual".
CLMV - LOCKS < > AND < > KEYS
This parameter locks the front panel keys <
> and < >, thus preventing the alteration of the output
value while in Manual mode, when inputs C and/or D have high logic level.
This prevents the operator from changing the output signal during situations of "safety output" or "forced
manual".
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