SECS GEM Manual.pdf - 第34页
GEM Manual for DEK Printers Capabilities Issue 1.6 January 22, 2018 Page 34 of 171 State Definitions (continued): OFF-LINE: ATTEMPT ON-LINE The operator can manually transit the equipment to the ON-LI NE state. To achiev…
GEM Manual for DEK Printers Capabilities
Issue 1.6 January 22, 2018 Page 33 of 171
4.4.3 Control (host initiated)
The host has the capability to cycle the equipment between the ON-LINE and OFF-LINE
states. The equipment can either ‘deny’, and not process the request, or ‘acknowledge’ the
request and transit to the required ON-LINE or OFF-LINE, state as dictated by the host.
The ability, of the host to exert control depends upon the equipment control state.
Control State Model
The control state behaviour is described by the following state model:
State Diagram:
C
POWER UP
EQUIPMENT
OFF-LINE
EQUIPMENT
ON-LINE
ATTEMPT
ON-LINE
LOCAL REMOTE
1
C
C
2
C
OFF-LINE
ON-LINE
C
7
3
4
5
6
8
9
10
11
12
State Definitions:
OFF-LINE - The SECS-II link is limited to the transactions below:
OFF-LINE: EQUIPMENT OFF-LINE
The operator can manually transit the equipment to the OFF-LINE state, sub-state
EQUIPMENT OFF-LINE. In this state, the SECS-II link operation is severely restricted,
except for the messages used for Connect and On-Line.
• No primary messages are sent to the Host, with the exception of S1F13 (Connect Request).
• If the Host sends S1F13 (Connect Request) the equipment replies with S1F14 (Connect
Acknowledge). If the Host sends any primary message with the W-bit "1" (reply expected)
other than S1F13 (Connect Request), the equipment refuses by sending an SxF0 reply.
GEM Manual for DEK Printers Capabilities
Issue 1.6 January 22, 2018 Page 34 of 171
State Definitions (continued):
OFF-LINE: ATTEMPT ON-LINE
The operator can manually transit the equipment to the ON-LINE state. To achieve this state
the equipment has to be in the ATTEMPT ON-LINE sub-state. In this state, the equipment is
attempting to transit from Off-Line to On-Line.
• The equipment sends S1F1 (Are you there) to the Host, requesting permission to go ON-
LINE. No other primary message is sent to the Host.
• If the Host sends S1F13 (Connect Request) the equipment will reply S1F14 (Connect
Acknowledge). If the Host sends any primary message with the W-bit "1" (reply expected)
other than S1F13 (Connect Request) the equipment refuses by sending an SxF0 reply.
OFF-LINE: HOST OFF-LINE
In this state:
• Only the host can transfer the equipment to ON-LINE.
• No primary message can be sent to the host, except for S1F13 (Connect Request).
• If the Host sends S1F17 (Request On-Line) the equipment will reply S1F18 (On-Line
Acknowledge). If the Host sends S1F13 (Connect Request) the equipment will reply S1F14
(Connect Acknowledge). If the Host sends any primary message with the W-bit "1" (reply
expected) other than S1F13 or S1F17 the equipment refuses by sending an SxF0 reply.
ON-LINE
In the ON-LINE state, the SECS II link operates normally, with no (or very few) restrictions.
• The equipment may send S1F13 (Connect Request). It never sends an SxF0 reply.
• If the Host sends S1F13 (Connect Request) the equipment will reply S1F14 (Connect Ack).
• If the Host sends S1F15 (Request Off-Line) the equipment will reply
S1F16 (Off-Line Acknowledge) and transfers to the Off-Line, Equipment Off-Line.
If the Host sends S1F17 (Request On-Line) the equipment will reject it, sending a S1F18
(On-Line Acknowledge) reply with ONLACK "2" (Equipment Already On-Line).
ON-LINE: REMOTE
In the REMOTE sub-state, the SECS II link operates normally. The equipment imposes no
special restrictions on S2F41 (Remote Command). The operator can also transit the equipment
to REMOTE manually, from the LOCAL sub-state. In this state if the operator issues a
command that causes the printer to perform a process action then the CEID “Operator
Command issued” will be sent.
ON-LINE: LOCAL
The operator can transit the equipment to the LOCAL sub-state manually.
In the LOCAL sub-state, the SECS-II link operates normally. In order to prevent the Host from
interfering with processing:
• The equipment imposes restrictions on the S2F41 (Host Command Send), by sending reply
S2F42 (Host Command Acknowledge) with non-zero HCACK for the FORWARD and
REVERSE X, Y, Theta OFFSETS, ADJUSTABLE PARAMETERS and LOAD
PRODUCT commands. The equipment also imposes restrictions on the START, STOP,
CLEAN SCREEN and PASTE DISPENSE commands.
The equipment enables all aspects of operator control. The operator can also transit the
equipment to REMOTE manually, from the LOCAL sub-state.
GEM Manual for DEK Printers Capabilities
Issue 1.6 January 22, 2018 Page 35 of 171
Transition Table:
# Current State Trigger New State Action Comment
1 (Entry to Control) Power up complete. Depends upon EC
1
. None See GemInitControlState EC.
2 (Entry to Control) Power up complete. Depends upon EC. None See GemOfflineSubstate EC.
3 Equipment Off-Line Operator switch. Attempt On-Line. S1F1
4 Attempt On-Line S1F1 fails.
Depends upon EC
.
None See GemOfflineSubstate EC.
5 Attempt On-Line S1F1 succeeds. ON-LINE
conditional.
None See GemOnlineSubstate and
GemPreviousControlState EC's.
6 ON-LINE, LOCAL
or REMOTE
Operator switch. Equipment Off-Line Save
state.
New GemPreviousControlState.
7 (Entry to Control) Power up complete. Depends upon EC. None See GemOnlineSubstate EC.
8 LOCAL Operator switch. REMOTE None
9 REMOTE Operator switch. LOCAL None
10 ON-LINE, LOCAL
or REMOTE
Host S1F15. Host Off-Line Save
state.
New GemPreviousControlState.
11 Host Off-Line S1F17. ON-LINE conditional None See GemOnlineSubstate.
12 Host Off-Line Operator switch. Equipment Off-Line Save New GemPreviousControlState.
1
EC - Equipment constant.
Scenarios:
Host requests that the equipment transfers to the Off-Line state:
Comments Host Equipment Comments
Host Request Off-Line.
S1F15 -->
<-- S1F0
<-- S1F16
[IF] Equipment in Off-Line.
[THEN]
Equipment does not process request.
[ELSE] Equipment replies Off-Line
acknowledge.
Equipment transfers to the Off-Line state.
Host requests that the equipment transfers to the On-Line state:
Comments Host Equipment Comments
Host Request On-Line.
S1F17 -->
<-- S1F18
<-- S1F18
<-- S1F18
[IF] Equipment is Host: Off-Line state not active.
[THEN] Equipment denies request.
(ONLACK = 1)
[ELSE] Equipment Host: Off-Line state is active.
Equipment acknowledges request.
(ONLACK = 0)
[IF] Equipment is Host: On-Line state is active.
[THEN] Equipment replies On-Line.
Acknowledge with ONLACK = 2 (Equipment
already On-Line.)
Host requests that the equipment performs a remote command:
Comments Host Equipment Comments
Host Command Send.
S2F41 -->
<-- S2F42
Host Command Acknowledge. HCACK = 0
(Assume command can be performed.)
Some of the previous transactions are restricted by the printer’s current processing activity.