IDEC OpenNet series User Manual

2: MODULE SPECIFICATIONS
2-20 OPENNET CONTROLLER USER’S MANUAL
Special Data Registers D8030 through D8036 (Protect Transistor Output Error)
A maximum of seven transistor protect source output modules can be mounted with one CPU module. The protect output
modules are numbered from one through seven in the order of increasing distance from the CPU module. When an over-
load or short circuit occurs, special data registers D8030 through D8036 store 1 to indicate the output module where the
overload occurred. D8030 through D8036 correspond to the first through seventh protect transistor modules, respectively.
When an overload or short circuit occurs, the transistor protect source output module detects the overload and shuts down
the output immediately to protect the external load and output circuit elements from permanent damage. Since the over-
load detection is based on the heating of the output element, the output circuit is turned on again when the output elements
have cooled down. Consequently, a continued overloaded status causes the output to turn on and off repeatedly, and even-
tually leads to deterioration of the output module.
When the cause of the short circuit is removed, the output module restores normal operation. However, once an overload
or short circuit occurs, the condition tends to continue for a long period of time. When the transistor protect source output
module is used, use of a protection program is recommended to turn off all outputs within 60 seconds as described below.
Sample Program 1: Turning All Outputs Off (when using one transistor protect source output module)
Sample Program 2: Turning All Outputs Off (when using seven transistor protect source output modules)
Caution
• A prolonged overload or short circuit may damage the output circuit elements of the transistor
protect source output module. Include a protection program in the user program to protect the
output module from damage caused by overheating.
S1 –
0
M8120
REPD1 –
D8030
M8120 is the initialize pulse special internal relay.
MOV stores 0 to data register D8030.
Special data register D8030 stores protect transistor output error
data when an overload or short-circuit occurs in the first protect
output modules.
When an overload occurs, D8030 stores 1.
When the D8030 data is 1, M8002 (all outputs off special inter-
nal relay) is turned on to turn off all outputs.
MOV(W)
DC=
1
D8030
M8002
S1 –
0
M8120
REP
7
D1 R
D8030
S2 R
D8030
D1 R
M10
M8120 is the initialize pulse special internal relay.
MOV stores 0 to seven data registers D8030 through D8036.
Special data registers D8030 through D8036 store protect tran-
sistor output error data when an overload or short-circuit occurs
in the first to seventh protect output modules, respectively.
When an overload occurs, D8030 through D8036 store 1.
M8125 is the in-operation output special internal relay.
ORW turns on M10 through M16 when D8030 through D8036
store 1, respectively.
When any of M10 through M16 turns on, 1-sec timer TML
starts to timedown.
When the preset value of 2 seconds is reached, M8002 is turned
on to turn off all outputs.
M8002 is the all outputs off special internal relay.
MOV(W)
ORW(W) S1 –
0
M8125
REP
7
M10
TML
2
T10
M8002
M11
M12
M13
M14
M15
M16
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IDEC OpenNet series Specifications

General

Brand	IDEC
Model	OpenNet series
Category	Controller
Language	English