The Printer Authorization Matrix (PAM) defines which printers the display stations in a cluster can use for local copy, host copy, and shared copy operations. A local copy transfers data directly from the display buffer to the printer buffer, and the data is printed. Printers that will not be used for local copy should not be entered in the matrix.
When you define the PAM, the capabilities of the local copy printer should match those of the source display, especially the capabilities for APLlText handling and support of the Extended Highlighting, Color, and Programmed Symbols functions.
If the print buffer is at least as large as the display buffer, a copy request can be serviced. However, if the other capabilities do not match, the printout may be degraded, depending on the contents of the display buffer when the copy request is serviced.
Figure 10-1 on page 10-4 is the PAM panel that appears on your screen during customization. "Worksheet 15-Printer Authorization Matrix (PAM)" corresponds to this panel.
Note: The size of the screen on the terminal used for customizing will determine how much information will be seen. For example, a 3278 Model 2 will show only 24 lines of information, while a 3278 Model 4 will display 43 lines of information.
For example, there are 10 of these panels on a Model 2 display. On the first panel of a Model 2 display, you can authorize as many as five printers for local copy.
Should you want to authorize more than five printers in the cluster for local copy, advance to the next panel.
Planning for PAM
Figure 10-1. The Printer Authorization Matrix (PAM) Each of the fields is described below.
Entry
The Printer Entry field displays a number to identify the printer that you assign for local copy. Printer Entry numbers may range from 1 to 47. You can assign the printers according to the maximum number permitted on each model of the 3174 and the possible combinations of AEA and 3270 printers allowed on each model, but the maximum number of printers you can assign is 47. See Table 10-1 below for the maximum number of 3270 and AEA printer port assignments for the different models of the 3174.
Table 10-1. Permitted Printer Assignment Combinations
3174 Control Number of Number of
Unit Models 3270 Printers AEA Printers
1L, 1R, 2R, and 3R 31 241
51R and 52R 15 8
53R, 81 R, and 82R 7 02
Printer Port
Mode
Planning for PAM
The Printer Entry field appears twice on the panel. In the top half of the panel, next to the Entry number, you can define for each entry its Printer Port, Mode, and Class. In the bottom half of the panel, for the same Printer Entry, you identify the ports of the displays that will use the printer for local copy operations.
Write the port number for the printer. Remember to include the two-digit prefix: 26, 21, 22, or 23. You cannot assign a local copy printer to port 26-00.
Note: If you are customizing for individual port assignment, check to be sure that the assigned addresses on "Worksheet 12-117:
Port Assignment" and the AEA Configure Worksheets (16 through 22) are consistent with the printer assignments defined here. The exception to this requirement is local copy printers; they do not require that a host address be assigned during port assignment. See "How to Configure the AEA" on page 13-56 for more information on the AEA Configure proce-dure.
In this field you define the mode in which the printer will operate:
o
= System 1 = Local 2=
Shared.A printer in system mode is under host (system) control. Since host control is the default mode for each printer if no matrix is defined, it is unnecessary to include a printer on the PAM if it will operate in system mode. When in system mode, the printer is protected from local copies, unless it is operating with SSC discipline. (The SSC Copy command does not use the PAM; it is directed to the to device and specifies the from device as a command parameter.)
A printer in local mode is used for only local-copy functions regard-less of host attachment or communication protocol. Displays within the cluster may contend for the use of the printer, but the host may not. That is, the host cannot use the printer for direct-print oper-ations. The display operator initiates a local copy by using the Print key; if the display is operating in SNA, the host can initiate a local copy from the display buffer.
In shared mode, the same printer performs both host-directed printing operations and local-copy operations. The efficiency of local copy operations in shared mode depends on the communication pro-tocol.
In SNA, a printer defined in shared mode may be used for local copy under either of these conditions:
• When the printer is not in session with a primary logical unit (PLU) in the host
• When Between Bracket Printer Sharing (question 213) has been specified in the Configure procedure and the printer is not in bracket state with the PLU in the host.
Planning for PAM
Class
Display Port
PF Keys
In non-SNA, shared mode is a less efficient choice for local copy operations. Host application sessions are longer, so there are fewer opportunities for a local copy between host communications.
When operating a printer in shared mode, the user must assume responsibility for the integrity of the printed data by following installa-tion rules and proper programming practices.
In this field, you will enter an X (capital letter) under the class or classes defined for the printer.
Some customers may want to group printers into classes, based, for example, on (1) physical characteristics (type font, character set, type of forms mounted), (2) location, or (3) security.· You can assign a class number ranging from 70 through 85. In your installation, class 72 may identify all printers with yellow paper. In any configuration, a single printer may be in one class, several, or none.
If you wanted to group several printers in class 72 and authorize the display on port 26-08 to use any of them, you would enter an X under Display Port 26-08 on the line for each printer in class 72. If the display then attempted a local copy with a class 72 printer already in use, the local copy would automatically be sent to another available printer in that same class.
Before performing a local copy, the display operator selects a partic-ular printer by class by holding down the AL T key and pressing the IDENT key, and then keying in the authorized class number (70 through 85) next to the printer symbol on the bottom of the screen.
Write an X under the port for each display authorized to use a partic-ular printer for local copy.
Note: Displays cannot perform local copies on printers that have ASCII hosts designated as their default destination on "Work-sheet 22-AEA Default Destination."
Your response in this field defines which displays may use each printer. You can assign more than one display to use the same printer for local copy.
The functions of the PF keys are explained in Chapter 13 under "How to Define the Printer Authorization Matrix (PAM)" on page 13-26.