Process interconnection

Controller

(1,1)

Transaction

(0,Max)

SIGNAL

report(charstring);

[go, stop]

cum_ctl

[report]

ctl_tra

[stop]

consortium

c_pan

pan_ctl

pan_tra

cum_tra

[q_valid]

[r_valid]

[userin]

[card]

[display,

cash,

eject]

BLOCK Central

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